Search Results: "Origins Of Algebra | Introduction To Algebra | Algebra I | Khan Academy"

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07:18 Popular
Origins Of Algebra | Introduction To Algebra | Algebra I | Khan Academy

1,150 views / 0 likes - added 8 years ago

Where did the word "Algebra" and its underlying ideas come from? Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/overview_hist_alg/v/abstract-ness?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Algebra I on Kha
07:00
Abstract-ness | Introduction To Algebra | Algebra I | Khan Academy

635 views / 0 likes - added 8 years ago

The general idea behind the word 'abstract' Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/overview_hist_alg/v/the-beauty-of-algebra?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Missed the previous lesson? h
06:55 Popular
What Are Variables, Expressions, And Equations? | Introduction To Algebra | Algebra I | Khan Academy

1,699 views / 0 likes - added 8 years ago

Learn what variables, expressions, and equations really are. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/introduction-to-algebra/feel-for-equations-and-inequalit/e/dependent-and-independent-variable
20:48 Popular
Introduction To Scientific Notation | Pre-Algebra | Khan Academy

1,901 views / 0 likes - added 8 years ago

Introduction to scientific notation. An in-depth discussion about why and how scientific notation is used. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/scientific-notation/e/sc
03:03 Popular
Introduction To Exponents | Pre-Algebra | Khan Academy

1,507 views / 0 likes - added 8 years ago

Taking an exponent is basically the act of repeated multiplication. You know how to multiply, right? If so, understanding exponents is completely within your grasp! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/ma
03:21 Popular
Introduction To Perimeter | Measurement | Pre-Algebra | Khan Academy

784 views / 0 likes - added 8 years ago

Find perimeter by adding side-lengths of various figures. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/measurement/perimeter/e/perimeter_1?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Wa
10:00
Introduction To Number Systems And Binary | Pre-Algebra | Khan Academy

611 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/hexadecimal-number-system?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.
04:17 Popular
Introduction To Area And Unit Squares | Measurement | Pre-Algebra | Khan Academy

1,546 views / 0 likes - added 8 years ago

Cover figures with square units to find their area. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/measurement/area-basics/e/measuring-area-with-unit-squares?utm_source=YT&utm_medium=Desc&utm_campa
14:13 Popular
Introduction To Ratios | Ratios, Proportions, Units, And Rates | Pre-Algebra | Khan Academy

1,902 views / 0 likes - added 8 years ago

What a ratio is. Simple ratio problems. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/ratios_and_proportions/e/ratio_word_problems?utm_source=YT&utm_medium=Desc&utm_campaign=PreAl
03:50 Popular
Introduction To Multiplying Decimals | Decimals | Pre-Algebra | Khan Academy

1,168 views / 0 likes - added 8 years ago

Multiplying decimals can be confusing because there's always the question as to where the decimals goes in the answer. We're about to show you so you'll never have to question it again! Practice this lesson yourself on KhanAcademy.org right now: https://w
05:02 Popular
Positive And Negative Slope | Algebra I | Khan Academy

1,491 views / 0 likes - added 8 years ago

Positive and negative slope Watch the next lesson: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/v/similar-triangles-to-prove-that-the-slope-is-constant-for-a-line?utm_source=YT&utm_medium=Desc&utm_campaign
07:51 Popular
Volume: How To Measure It | Measurement | Pre-Algebra | Khan Academy

778 views / 0 likes - added 8 years ago

Volume is a measurement in the 3rd dimension. This means that it not only has width and height, but it has depth as well. Let's watch this video in which we get a great explanation of how we measure volume. Practice this lesson yourself on KhanAcademy.org
03:36 Popular
Approximating Irrational Number Exercise Example | Pre-Algebra | Khan Academy

1,500 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/order-of-operations/rational-irrational-numbers/e/approximating-irrational-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the nex
09:36 Popular
Negative Numbers Introduction | Negative Numbers And Absolute Value | Pre-Algebra | Khan Academy

2,162 views / 0 likes - added 8 years ago

Mysterious negative numbers! What ARE they? They are numbers less than zero. If you understand the nature of below zero temperatures, you can understand negative numbers. We'll help. Practice this lesson yourself on KhanAcademy.org right now: https://www.
02:36 Popular
How To Interpret An Expression With Function Notation | Functions | Algebra I | Khan Academy

1,958 views / 0 likes - added 8 years ago

Sal interprets the expression P(5) minor P(9) where P models the number of people at the beach over time. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/interpreting-function-notation
08:21 Popular
Two-variable Linear Equations And Their Graphs | Algebra I | Khan Academy

1,988 views / 0 likes - added 8 years ago

Introduction to 2-variable linear equations and their graphs Watch the next lesson: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/v/checking-ordered-pair-solutions-to-equatio
07:34 Popular
Hexadecimal Number System | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,090 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/decimal-to-binary?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math
05:27 Popular
Converting Directly From Binary To Hexadecimal | Pre-Algebra | Khan Academy

1,277 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/World-of-exponents/v/exponents-warmup?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math/pre-algebra/app
05:37 Popular
Linear Models Example 2 | Algebra I | Khan Academy

1,138 views / 0 likes - added 8 years ago

Marbles and water in tank Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/e/constructing-and-interpreting-linear-functions?utm_s
06:17 Popular
Solving Percent Problems | Decimals | Pre-Algebra | Khan Academy

879 views / 0 likes - added 8 years ago

We'll use algebra to solve this percent problem. Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-word-probs-pre-alg/v/solving-percent-problems-2?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the
12:49 Popular
Scientific Notation Examples | Pre-Algebra | Khan Academy

1,159 views / 0 likes - added 8 years ago

More scientific notation examples Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/scientific-notation/e/scientific_notation?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra W
01:07 Popular
How To Match Function Input To Output Given The Graph (example) | Algebra I | Khan Academy

1,074 views / 0 likes - added 8 years ago

Sal finds the input value for which g(x)=-2 given the graph of g. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inputs_outputs?utm_so
01:40 Popular
How To Match Function Input To Output Given The Formula (example) | Algebra I | Khan Academy

1,003 views / 0 likes - added 8 years ago

Sal finds the input value for which f(t)=13, given that f(t)=-2t+5. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inputs_outputs?utm_
09:17 Popular
Unit Conversion Within The Metric System | Pre-Algebra | Khan Academy

1,825 views / 0 likes - added 8 years ago

Metric unit conversion Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/metric-system-tutorial/v/converting-within-the-metric-system?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? http
03:04 Popular
How To Create A Function From An Equation (example) | Functions | Algebra I | Khan Academy

904 views / 0 likes - added 8 years ago

Sal find the formula of a function that, given an input value "b," outputs a value "a" that satisfies the equation 4a+7b=-52. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/functions-
03:43 Popular
Converting From Decimal To Hexadecimal Representation | Pre-Algebra | Khan Academy

1,427 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/binary-addition?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math/p
03:24 Popular
How To Interpret An Expression With Function Notation | Functions | Algebra I | Khan Academy

1,418 views / 0 likes - added 8 years ago

Sal interprets the expression M(30)-M(0)=100 where M models an account balance over time. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/interpreting-function-notation/e/function-nota
08:52 Popular
Linear Models Example 1 | Algebra I | Khan Academy

1,859 views / 0 likes - added 8 years ago

Linear model for book reading Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/e/constructing-and-interpreting-linear-functions?u
02:48 Popular
Adding In Binary | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,029 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/binary-multiplication?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/
03:00 Popular
Inverse Property Of Addition | Arithmetic Properties | Pre-Algebra | Khan Academy

1,732 views / 0 likes - added 8 years ago

The simple idea that a number plus its negative is 0 Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/order-of-operations/arithmetic_properties/v/inverse-property-of-multiplication?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra M
06:56 Popular
Exponents And Powers Of Zero Patterns | Pre-Algebra | Khan Academy

1,108 views / 0 likes - added 8 years ago

Now that we understand how to interpret an exponent and how the patterns in zeros are related to the exponent, we can solve more complicated problems! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra
08:13 Popular
Prime Numbers | Factors And Multiples | Pre-Algebra | Khan Academy

1,163 views / 0 likes - added 8 years ago

What does it mean to be a prime number? Let's progress though some whole numbers and ask ourselves if they meet the criteria. What is the criteria you ask? Watch. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math
05:20 Popular
Order Of Operations: PEMDAS | Arithmetic Properties | Pre-Algebra | Khan Academy

1,854 views / 0 likes - added 8 years ago

Work through another challenging order of operations example with only positive numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/order-of-operations/order_of_operations/e/order_of_operations
09:16 Popular
Adding/subtracting Negative Numbers | Pre-Algebra | Khan Academy

1,347 views / 0 likes - added 8 years ago

Adding and subtracting negative numbers Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/negatives-absolute-value-pre-alg/mult-div-negatives-pre-alg/v/multiplying-positive-and-negative-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=
02:40 Popular
Interpreting Linear Formulas Example 1 | Algebra I | Khan Academy

2,187 views / 0 likes - added 8 years ago

Interpreting a linear formula Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/e/interpreting-features-of-linear-functions?ut
02:35 Popular
Interpreting Linear Formulas Example 2 | Algebra I | Khan Academy

1,419 views / 0 likes - added 8 years ago

Linear equation for file transfer Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/interpreting_linear_functions/e/interpreting-features-of-linear-function
07:11 Popular
Graphing Solutions To Two-variable Linear Equations Example 2 | Algebra I | Khan Academy

1,990 views / 0 likes - added 8 years ago

Graphing solutions to 2 variable linear equations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/graphing-solutio
09:43 Popular
Exponent Rules Part 1 | Exponents, Radicals, And Scientific Notation | Pre-Algebra | Khan Academy

1,580 views / 0 likes - added 8 years ago

Introduction to exponent rules Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/exponent-properties/e/exponent_rules?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the
03:12 Popular
Graphing Linear Functions Example 2 | Algebra I | Khan Academy

1,893 views / 0 likes - added 8 years ago

Graphing equation for filling pool Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/e/graphing-linear-functions-word-problems?utm
03:33 Popular
Finding A Percentage | Decimals | Pre-Algebra | Khan Academy

1,246 views / 0 likes - added 8 years ago

Once again, fractions are our friends as we use them to find a percentage. You'll also see a couple of different ways to arrive at the answer. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimal
06:35 Popular
Constructing Linear Functions Example 1 | Algebra I | Khan Academy

1,723 views / 0 likes - added 8 years ago

Linear model for ice sheet thickness Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/linear-functions-modeling/e/constructing-linear-functions-word-proble
04:31 Popular
Number Patterns: Interpreting Relationships | Pre-Algebra | Khan Academy

1,535 views / 0 likes - added 8 years ago

Examining the points on a number line and interpreting the patterns to discover the relationships. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/number-patterns/e/vis
03:52 Popular
Converting From Decimal To Binary | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,509 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/large-number-decimal-to-binary?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanaca
01:34 Popular
Solving Ratio Problems With Graph | Pre-Algebra | Khan Academy

1,885 views / 0 likes - added 8 years ago

In this example we'll plot points on the x and y axis to reflect the given ratios. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/ratios_and_proportions/e/solving-ratio-problems-wi
02:07 Popular
Percentage Of A Whole Number | Decimals | Pre-Algebra | Khan Academy

1,516 views / 0 likes - added 8 years ago

We hope you're beginning to see that there's more than one way to skin a cat. In other words, there are several different ways to solve problems involving percentages, decimals, and fractions. Watch as find the percentage of a whole number. Watch the next
03:09 Popular
Simplifying Square Roots | Exponents, Radicals, And Scientific Notation | Pre-Algebra | Khan Academy

1,761 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/radical-radicals/e/simplifying_radicals?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the next lesson: https://www.kh
05:30 Popular
Graphing Linear Functions Example 1 | Algebra I | Khan Academy

1,815 views / 0 likes - added 8 years ago

Learn how graph a linear function. This video gives an example of graphing fuel consumption as a function of distance. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-
06:14 Popular
How To Plot Inequalities On A Number Line | Pre-Algebra | Khan Academy

1,517 views / 0 likes - added 8 years ago

Learn how to graph an inequality on a number line to indicate which values make it true. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/greater-than-less-than/e/writin
05:09 Popular
Converting From Slope-intercept To Standard Form | Algebra I | Khan Academy

1,309 views / 0 likes - added 8 years ago

Converting from slope-intercept to standard form Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/standard-form/e/converting_between_slope_intercept_and_st
05:05 Popular
Solving Ratio Problems With Tables Example 1 | Pre-Algebra | Khan Academy

874 views / 0 likes - added 8 years ago

We're displaying ratios in a table format here, and then asking: given a ratio, solve for equivalent ratios. Here are a few examples to practice on. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/r
07:08 Popular
Early Train Word Problem | Linear Equations | Algebra I | Khan Academy

873 views / 0 likes - added 8 years ago

Fun word problem that is almost a brain teaser. Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/More-equation-practice/v/patterns-in-sequences-1?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
04:16 Popular
Least Common Multiple Exercise | Factors And Multiples | Pre-Algebra | Khan Academy

1,135 views / 0 likes - added 8 years ago

We're practicing finding the least common multiple in these example exercises. We'll teach you the prime factorization approach which is a pretty nifty way to find the lcm (least common multiple). Practice this lesson yourself on KhanAcademy.org right now
08:30 Popular
Multiplying And Dividing Negative Numbers | Pre-Algebra | Khan Academy

1,787 views / 0 likes - added 8 years ago

Multiplying and dividing negative numbers Watch the next lesson: https://www.khanacademy.org/math/arithmetic/absolute-value/abs_value_tutorial/v/absolute-value-and-number-lines?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous less
04:07 Popular
Adding And Subtracting Negative Numbers | Pre-Algebra | Khan Academy

1,326 views / 0 likes - added 8 years ago

Learn how to add and subtract negative numbers. The problems solved in this video are 2 - 3 = -1 and -2 - 3 = -5 and -2 + 3 = 1 and 2 - (-3) = 5 and -2 - (-3). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pr
03:28 Popular
Inequality Word Problems | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,604 views / 0 likes - added 8 years ago

We're writing inequalities by using information from the word problems. Woohoo! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/greater-than-less-than/e/writing-numeric
05:34 Popular
Multiplying Positive And Negative Numbers | Pre-Algebra | Khan Academy

1,375 views / 0 likes - added 8 years ago

Learn some rules of thumb for multiplying positive and negative numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/arithmetic/absolute-value/mult_div_negatives/e/multiplying_and_dividing_negative_numbers?
02:49 Popular
Percent Word Problem Example 2 | Decimals | Pre-Algebra | Khan Academy

1,172 views / 0 likes - added 8 years ago

It's nice to practice conversion problems, but how about applying our new knowledge of percentages to a real life problem like recycling? Hint: don't forget your long division! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanac
02:27 Popular
Checking Ordered Pair Solutions To Equations Example 2 | Algebra I | Khan Academy

1,045 views / 0 likes - added 8 years ago

Second example of ordered pair solutions Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/plugging_in_values?utm_so
02:36 Popular
Number Patterns: Seeing Relationships | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,025 views / 0 likes - added 8 years ago

Laying the foundation for algebraic thinking by learning to recognize the relationships between patterns and graphing out those relationships. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applyin
06:20 Popular
Greatest Common Factor Explained | Factors And Multiples | Pre-Algebra | Khan Academy

1,169 views / 0 likes - added 8 years ago

Here's a nice explanation of least common factor (or least common divisor) along with a few practice example exercises. Let's roll. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/factors-multiples/
02:35 Popular
Checking Ordered Pair Solutions To Equations Example 1 | Algebra I | Khan Academy

1,258 views / 0 likes - added 8 years ago

Checking ordered pair solutions to equations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/plugging_in_values?ut
03:38 Popular
Math Patterns Example 1 | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

711 views / 0 likes - added 8 years ago

Part of our exploration of math is learning to identify patterns among numbers. Can you see the pattern in this example? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/exercise/math-patterns?utm_source=YT&utm_mediu
05:41 Popular
Math Patterns Example 2 | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

704 views / 0 likes - added 8 years ago

We continue to strengthen our skill in identifying patterns. This time we'll use a table to track the pattern. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/exercise/math-patterns?utm_source=YT&utm_medium=Desc&utm
08:34 Popular
LCM And GCF Word Problems | Factors And Multiples | Pre-Algebra | Khan Academy

1,796 views / 1 likes - added 8 years ago

Here we have a couple of word problems--one searching for the least common multiple and the other for the greatest common factor. Just read them with us slowly and follow along. You'll get it. Practice this lesson yourself on KhanAcademy.org right now: ht
03:40 Popular
Multi-step Word Problem With Decimals And Subtraction | Pre-Algebra | Khan Academy

1,568 views / 0 likes - added 8 years ago

First visualize this word problem then use subtraction and multiplication of decimals and fractions to get at the answer. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topi
00:52 Popular
Reading Bar Charts: Basic Example | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,371 views / 0 likes - added 8 years ago

Let's start with this bar chart that brings back the days of Harry Potter! Putting our toes in the water on this one... Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/
02:27 Popular
Inequality Word Problem: One Variable | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,036 views / 0 likes - added 8 years ago

This time we're creating a variable to represent a number, and then writing an inequality. We're building on our knowledge. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-to
03:21 Popular
Rational Number Word Problem With Fractions | Pre-Algebra | Khan Academy

1,707 views / 0 likes - added 8 years ago

Word problems force us to put concepts to work using real-world applications. In this example, determine the volume of frozen water and express the answer as a fraction. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.o
12:07 Popular
Algebra Basics: What Is Algebra? - Math Antics

2,306 views / 1 likes - added 8 years ago

The first video in the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEBWbAHUszT_GebJK23JHdd_Bss1N-G Next video: https://youtu.be/l3XzepN03KQ This video gives an overview of Algebra and introduces the concepts of unknown value
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09:50 Popular
Adding And Subtracting Fractions | Fractions | Pre-Algebra | Khan Academy

2,070 views / 1 likes - added 8 years ago

How to add and subtract fractions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/e/adding_fractions?utm_source=YT&utm_medium=Desc&utm_campaign=PreA
04:51 Popular
Cube Root Of A Non-perfect Cube | Pre-Algebra | Khan Academy

1,268 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/cube-root-tutorial/e/cube_roots?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the next lesson: https://www.khanacadem
03:53 Popular
Plotting Basic Fractions On The Number Line | Fractions | Pre-Algebra | Khan Academy

1,363 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/understanding-fractions-pre-alg/e/fractions_on_the_number_line_1?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the nex
04:33 Popular
Multiplying Negative And Positive Fractions | Fractions | Pre-Algebra | Khan Academy

873 views / 0 likes - added 8 years ago

See examples of multiplying and dividing fractions with negative numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/multiplying-fractions-pre-alg/e/multiplying_fractions?utm_
05:51 Popular
Equivalent Fractions | Fractions | Pre-Algebra | Khan Academy

2,074 views / 0 likes - added 8 years ago

Introduces the concept of equivalent fractions Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/equivalent-fractions-pre-alg/e/equivalent_fractions?utm_source=YT&utm_medium=Desc&utm
01:11 Popular
Subtracting Decimals: Example 1 | Decimals | Pre-Algebra | Khan Academy

1,084 views / 0 likes - added 8 years ago

Subtracting decimals...up to the hundredths placement. Line up those decimals before you start. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/adding-decimals-pre-alg/e/subtracting
06:29 Popular
Multiplying Decimals: Place Value And Reordering | Decimals | Pre-Algebra | Khan Academy

1,383 views / 0 likes - added 8 years ago

We want you to develop an intuition about how to work with decimals. Understanding how you can rewrite decimals by considering the place value will help you multiply! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/
02:39 Popular
Comparing Decimals: Ordering From Least To Greatest | Decimals | Pre-Algebra | Khan Academy

1,891 views / 0 likes - added 8 years ago

This is a fun example where we reorder decimals from smallest to largest. You're looking for the place value that is the most significant, and then working backwards. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/
09:23 Popular
Converting Fractions To Decimals | Decimals | Pre-Algebra | Khan Academy

2,081 views / 2 likes - added 8 years ago

How to express a fraction as a decimal Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/e/converting_fractions_to_decimals?utm_source=YT&utm_medium=Desc&u
09:15 Popular
Mixed Numbers And Improper Fractions | Fractions | Pre-Algebra | Khan Academy

1,745 views / 2 likes - added 8 years ago

Converting mixed numbers to improper fractions and improper fractions to mixed numbers Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/mixed-numbers-pre-alg/e/converting_mixed_numb
09:45 Popular
Simplifying Radicals | Exponents, Radicals, And Scientific Notation | Pre-Algebra | Khan Academy

1,524 views / 1 likes - added 8 years ago

Using exponent rules to simplify radicals or square roots Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/radical-radicals/e/simplifying_radicals?utm_source=YT&utm_medium=Desc&utm
04:20 Popular
Dividing A Whole Number By A Decimal | Decimals | Pre-Algebra | Khan Academy

1,704 views / 1 likes - added 8 years ago

When dividing a whole number by a decimal, you're going to need to change that decimal into a whole number. How? We'll show you. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/divi
05:42 Popular
Understanding Division Of Fractions | Fractions | Pre-Algebra | Khan Academy

1,207 views / 0 likes - added 8 years ago

Using a number line, we'll explain the rule of "invert and multiply" when dividing two fractions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/div-fractions-fractions-pre-alg/e/
07:14 Popular
Negative Exponents | Exponents, Radicals, And Scientific Notation | Pre-Algebra | Khan Academy

1,572 views / 0 likes - added 8 years ago

How does a negative exponent affect our answer? Before you assume that the answer must be negative, think again! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/negative-exponents
09:29 Popular
Dividing Decimals With Hundredths Example 3 | Decimals | Pre-Algebra | Khan Academy

1,076 views / 0 likes - added 8 years ago

The old saying is "practice makes perfect." Let's keep practicing dividing decimals and making our divisor a whole number. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/dividing-d
04:25 Popular
Multiplying Challenging Decimals | Decimals | Pre-Algebra | Khan Academy

959 views / 0 likes - added 8 years ago

Sometimes multiplying really small decimals (with all those zeros!) can be a little intimidating. Watch as we show you a handy trick to simplify these problems and solve them. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanaca
03:08 Popular
Multiplying Unit Fractions And Whole Numbers | Fractions | Pre-Algebra | Khan Academy

1,657 views / 1 likes - added 8 years ago

Don't let multiplying whole numbers and fractions get you down. We got this. This explanation will help you become a pro. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/multiplyin
02:36 Popular
Converting Decimals To Percents | Decimals | Pre-Algebra | Khan Academy

1,472 views / 0 likes - added 8 years ago

Need to convert a decimal to a percent? Ok, we'll just use our fraction friends to get us there. Watch and be amazed. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-intro-p
04:24 Popular
Example Of Subtracting Fractions With Unlike Denominators | Fractions | Pre-Algebra | Khan Academy

1,599 views / 0 likes - added 8 years ago

If you conquered adding fractions with different denominators, then subtracting fractions will be a snap. Don't worry...we'll take it slow and explain every step. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math
02:35 Popular
Dividing Whole Numbers And Fractions: Studying | Fractions | Pre-Algebra | Khan Academy

2,048 views / 0 likes - added 8 years ago

Solve a word problem by dividing a fraction by a whole number. The example used in this video is 1/5 ÷ 4. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/dividing-fractions-pre-alg
03:45 Popular
Visualizing Equivalent Fractions | Fractions | Pre-Algebra | Khan Academy

1,086 views / 0 likes - added 8 years ago

To understand equivalent fractions it helps to "see" the fractions using something like a grid with shaded and unshaded sections representing the fraction. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-al
02:32 Popular
Dividing Whole Numbers And Fractions: Potpourri | Fractions | Pre-Algebra | Khan Academy

1,727 views / 0 likes - added 8 years ago

Solve a word problem by dividing a whole number by a fraction. The example used in this video is 4 ÷ 1/5. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/dividing-fractions-pre-alg
04:00 Popular
Finding Factors And Multiples | Factors And Multiples | Pre-Algebra | Khan Academy

1,631 views / 1 likes - added 8 years ago

To find the factors of a number means to find all the whole numbers that the number in question is divisible by. Can you help us find the factors in this example? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math
12:14 Popular
Algebra Basics: Exponents In Algebra - Math Antics

1,337 views / 0 likes - added 8 years ago

Part of the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEBWbAHUszT_GebJK23JHdd_Bss1N-G Previous video: https://youtu.be/K6ewhnaL4KQ This video shows how exponents can be used more generally with variables. It explains why x
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15:46
Linear Algebra: Introduction to Linear Independence

572 views / 0 likes - added 9 years ago

Linear Algebra: Introduction to linear dependence and independence More free lessons at: http://www.khanacademy.org/video?v=CrV1xCWdY-g
05:26
Factors And Divisibility In Algebra

492 views / 0 likes - added 8 years ago

Factors and divisibility in algebra
10:29 Popular
Algebra Basics: Solving 2-Step Equations - Math Antics

2,155 views / 1 likes - added 8 years ago

There was a confusing example in the original video. This is the updated version. This video shows students how to solve 2-step Algebra equations involving one addition or subtraction and one multiplication or division. Part of the Algebra Basics Series:
19:53
Linear Algebra - Matrix Transformations

592 views / 0 likes - added 5 years ago

Matrix multiplication and linear algebra explained with 3D animations.
09:35 Popular
Algebra Basics: Solving Basic Equations Part 2 - Math Antics

2,759 views / 0 likes - added 8 years ago

Part of the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEBWbAHUszT_GebJK23JHdd_Bss1N-G Previous video: https://youtu.be/l3XzepN03KQ Next video: Coming Soon This video shows students how to solve simple 1-step Algebra equati
14:11
Algebra Basics: Inequalities In Algebra - Math Antics

350 views / 0 likes - added 1 year ago

Learn More at mathantics.comVisit http://www.mathantics.com for more Free math videos and additional subscription based content!
11:08 Popular
Algebra Basics: Solving Basic Equations Part 1 - Math Antics

2,542 views / 3 likes - added 8 years ago

Part of the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEBWbAHUszT_GebJK23JHdd_Bss1N-G Previous video: https://youtu.be/NybHckSEQBI Next video: https://youtu.be/Qyd_v3DGzTM This video shows students how to solve simple 1-st
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15:47
Linear Algebra: Cross Product Introduction

568 views / 0 likes - added 9 years ago

Introduction to the cross product More free lessons at: http://www.khanacademy.org/video?v=pJzmiywagfY
18:54
Linear Algebra: Introduction to the inverse of a function

639 views / 0 likes - added 9 years ago

Introduction to the inverse of a function More free lessons at: http://www.khanacademy.org/video?v=-eAzhBZgq28
07:37
Introduction to reaction quotient Qc | Chemical equilibrium | Chemistry | Khan Academy

646 views / 0 likes - added 6 years ago

Introduction to the reaction quotient Qc, and how to use the reaction quotient to predict how the reaction concentrations will change. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its
24:47
Linear Algebra: Parametric Representations of Lines

561 views / 0 likes - added 9 years ago

Linear Algebra: Parametric Representations of Lines in R2 and R3 More free lessons at: http://www.khanacademy.org/video?v=hWhs2cIj7Cw
10:10 Popular
IIT JEE Hairy Trig and Algebra (part 1)

711 views / 0 likes - added 9 years ago

2010 Paper 1 problem 38 Hairy Trig and Algebra.avi More free lessons at: http://www.khanacademy.org/video?v=dOxXl_6BDQc
47:36
Completing the square - Live algebra lesson

635 views / 0 likes - added 6 years ago

Do you need help with your algebra homework? Send photos of any problems you need help with to LiveStream@MathMeeting.com. Today I am focusing on solving quadratic equations by completing the square. I will help you live right here on this live stream :)
09:54
IIT JEE Hairy Trig and Algebra (Part 2)

692 views / 0 likes - added 9 years ago

2010 IIT JEE Paper 1 #38 Hairy Trig and Algebra (Part 2) More free lessons at: http://www.khanacademy.org/video?v=6t9ogglXNIM
06:28
IIT JEE Hairy Trig and Algebra (Part 3)

677 views / 0 likes - added 9 years ago

2010 IIT JEE Paper 1 #38 Hairy Trig and Algebra (Part 3) More free lessons at: http://www.khanacademy.org/video?v=KVRpXvrsSKM
54:07 Popular
Logic Gates, Truth Tables, Boolean Algebra AND, OR, NOT, NAND & NOR

1,349 views / 0 likes - added 3 years ago

This electronics video provides a basic introduction into logic gates, truth tables, and simplifying boolean algebra expressions. It discusses logic gates such as the AND, OR, NOT, NAND and NOR Gates. This video is for college students who are taking intr
13:05
How To Graph Equations in Algebra

575 views / 0 likes - added 3 years ago

This algebra video tutorial explains how to graph equations such as linear equations in slope intercept form & standard form as well as quadratic functions using transformations, factoring, & setting up a data table.Algebra Textbooks:https://amzn.to/3cetP
11:09 Popular
Algebra Basics: What Are Polynomials? - Math Antics

1,773 views / 0 likes - added 8 years ago

This video introduces students to polynomials and terms. Part of the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEBWbAHUszT_GebJK23JHdd_Bss1N-G Learn More at mathantics.com Visit http://www.mathantics.com for more Free math
06:52 Popular
Introduction To Partial Pressure | Gases And Kinetic Molecular Theory | Chemistry | Khan Academy

1,594 views / 0 likes - added 7 years ago

Definition of partial pressure and Dalton's law of partial pressure. Example of calculating partial pressure of a gas in a mixture from the total pressure and partial pressure of the other gases in the mixture. Chemistry on Khan Academy: Did you know that
11:16
Linear Algebra: Introduction to Orthonormal Bases

666 views / 0 likes - added 9 years ago

Looking at sets and bases that are orthonormal -- or where all the vectors have length 1 and are orthogonal to each other. More free lessons at: http://www.khanacademy.org/video?v=7BFx8pt2aTQ
07:43
Linear Algebra: Introduction to Eigenvalues and Eigenvectors

676 views / 0 likes - added 9 years ago

What eigenvectors and eigenvalues are and why they are interesting More free lessons at: http://www.khanacademy.org/video?v=PhfbEr2btGQ
10:43 Popular
Algebra Basics: Simplifying Polynomials - Math Antics

3,115 views / 2 likes - added 8 years ago

In this video, we explain the concept of "like terms" and show how polynomials can be simplified by combining like terms. Part of the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEBWbAHUszT_GebJK23JHdd_Bss1N-G Learn More at
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11:54 Popular
Algebra Basics: The Distributive Property - Math Antics

3,216 views / 0 likes - added 7 years ago

This video introduces the Distributive Property in its general algebraic form: a(b + c) = ab + ac It shows how this patten is helpful when working with polynomials. Part of the Algebra Basics Series: https://www.youtube.com/watch?v=NybHckSEQBI&list=PLUPEB
03:36 Popular
Introduction to contractions | The Apostrophe | Punctuation | Khan Academy

930 views / 1 likes - added 6 years ago

Apostrophes are great at standing in for missing letters, allowing us to shorten words. Paige and David discuss contractions and the Principle of Least Effort. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/
01:49 Popular
How To Find Two Function Inputs With The Same Output Given Graph (example) | Khan Academy

1,796 views / 0 likes - added 8 years ago

Sal finds the input value other than -5 for which f(x)=f(-5), given the graph of f. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inp
00:42
The Algebra Plant #shorts

152 views / 0 likes - added 1 year ago

A tremendous amount of math is found in nature, and it's most obvious in Fibonacci/Golden Ratio patterns in the world's flora. But the Schumanniophyton problematicum plant's leaves are determined by algebra, and a simple equation can tell you exactly how
03:45
Introduction to the possessive | The Apostrophe | Punctuation | Khan Academy

602 views / 0 likes - added 6 years ago

Apostrophes can help show when something belongs to someone. Paige and David explain how! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/introduction-to-the-possessive-case Watch the next lesson: https://www
07:23 Popular
Introduction To Transformations | Transformations | Geometry | Khan Academy

1,726 views / 0 likes - added 8 years ago

Introduction to transformations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-translations-on-the-coordinate-plane?utm_source=YT&utm_medium=De
02:19 Popular
How To Determine The Domain Of A Modeling Function (example With A Function) | Khan Academy

1,258 views / 0 likes - added 8 years ago

Sal determines the domain of a function that models the height of a plant over time. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/determining-the-domain-of-a-function/e/interpreting
01:26
Introduction to verbs | The parts of speech | Grammar | Khan Academy

611 views / 0 likes - added 6 years ago

Let's explore what verbs are, and what they do! David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/identifying-verbs?utm_source=YT&utm_medium
07:25 Popular
Algebra Word Problem - Factoring

1,688 views / 0 likes - added 7 years ago

Learn how to solve this algebra word problem by factoring. A garden has an area of 84 square feet and the length is 8 feet longer than the width. You must find the dimensions of the garden using factoring. My name is Chris and my passion is to teach math.
04:50
Introduction to the apostrophe | The Apostrophe | Punctuation | Khan Academy

603 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, introduce a new piece of punctuation: the apostrophe! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-comma/e/introduction-to-the-apostrophe Watch the next lesson: https://www.k
04:09 Popular
Easy algebra word problem - But can you solve it?

1,433 views / 0 likes - added 7 years ago

Two workers can build a house in 4 days. One worker can build the house by himself in 6 days. How long would it take the other worker to build the house by himself? Can you solve this easy algebra word problem? My name is Chris and my passion is to teach
05:38 Popular
Algebra word problem - System of Equations

1,858 views / 0 likes - added 7 years ago

Solve this fun algebra word problem using a system of equations. If each jar has three cookies, one jar will be empty. If each jar has two cookies, there will be one cookie left over. Use a system of equations to find how many cookies and jars we have. My
01:46 Popular
Introduction to verb tense | The parts of speech | Grammar | Khan Academy

799 views / 0 likes - added 6 years ago

An understanding of verb tense will make you into a TIME WIZARD, with the ability to control the past, the present, and the future – with your words, anyway. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/
04:28 Popular
Introduction To Nouns | The Parts Of Speech | Grammar | Khan Academy

1,124 views / 0 likes - added 8 years ago

David, Khan Academy's resident grammarian, introduces you to the most common English part of speech: the noun. Watch the next lesson: https://youtu.be/ETzngG8N3AU About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a pers
02:51 Popular
The Horse Horseshoe Boots Viral Algebra Problem - The Correct Answer Explained

1,710 views / 2 likes - added 7 years ago

A lot of people are arguing over the correct answer to this algebra problem involving horses, horseshoes, and boots. A Facebook post with this problem has over 500,000 comments. Can you figure it out? In this video I explain the correct answer. Blog post:
04:35 Popular
Introduction To Singular And Plural Nouns | The Parts Of Speech | Grammar | Khan Academy

1,267 views / 0 likes - added 8 years ago

David, Khan Academy's resident grammarian, introduces the difference between singular and plural nouns. Watch the next lesson: https://youtu.be/uYgcuyUF7JQ About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalize
02:46 Popular
Introduction to Grammar | Grammar | Khan Academy

961 views / 0 likes - added 6 years ago

Khan Academy Grammarian David Rheinstrom welcomes you to his favorite topic: the study of language, its rules, and its conventions. By understanding English – by speaking it, by writing it, by reading this very sentence – you are a grammarian yourself! Wa
01:50
Introduction to verb aspect | The parts of speech | Grammar | Khan Academy

567 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
03:29
Introduction to irregular verbs | The parts of speech | Grammar | Khan Academy

562 views / 0 likes - added 6 years ago

Words like "walk" and "look" are regular verbs – they behave in a predictable way. But there's a whole class of words in English, called irregular verbs, that are harder to predict. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Acad
08:26
Conjugate acid-base pairs | Acids and bases | Chemistry | Khan Academy

579 views / 0 likes - added 6 years ago

Introduction to conjugate acid-base pairs. Definition and examples of conjugate acid-base pairs. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivit
03:48 Popular
Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

1,447 views / 0 likes - added 7 years ago

The Harvard admissions exam in 1869 included this algebra problem: "A man bought a watch, a chain, and a locket for $216. The watch and locket together cost three times as much as the chain, and the chain and locket together cost half as much as the watch
02:38 Popular
Graphing Linear Equations — Harder Example | Math | New SAT | Khan Academy

899 views / 0 likes - added 8 years ago

Watch Sal work through a harder Graphing linear equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/v/sat-math-h3-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
02:55 Popular
Linear Equation Word Problems — Basic Example | Math | New SAT | Khan Academy

1,220 views / 0 likes - added 8 years ago

Watch Sal work through a basic Linear equations word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/v/sat-math-h2-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the prev
03:39 Popular
Introduction To Subtraction | Basic Addition And Subtraction | Early Math | Khan Academy

748 views / 0 likes - added 8 years ago

Learn what it means to subtract. The examples used in this video are 4-3 and 5-2. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-intro/e/subtractio
03:11
Introduction To Addition | Basic Addition And Subtraction | Early Math | Khan Academy

668 views / 0 likes - added 8 years ago

Learn what it means to add. The examples used in this video are 1+1 and 2+3. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-intro/e/addition_1?utm_
06:47 Popular
Noble Gas Configuration | Electronic Structure Of Atoms | Chemistry | Khan Academy

1,485 views / 0 likes - added 8 years ago

How to write electron configurations for atoms and monatomic ions using noble gas configuration Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity
07:48 Popular
Introduction To The SAT Writing & Language Test | Tips & Planning | New SAT | Khan Academy

753 views / 0 likes - added 8 years ago

This is the last video in our New SAT subject! Missed the previous lesson? https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-reading-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT New SAT (starting M
07:57 Popular
Le Chatelier's principle: Worked example | Chemical equilibrium | Chemistry | Khan Academy

936 views / 0 likes - added 6 years ago

A worked example using Le Chatelier's principle to predict how concentrations will shift for different perturbations. Example includes changes in reaction vessel volume, changing amount of solid product, adding inert gas, and adding a catalyst. Chemistry
04:21
Introduction To The SAT Reading Test | Tips & Planning | New SAT | Khan Academy

599 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-writing-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous lesson? https://www.khanacademy.org/test-prep/new-s
10:07
The Beauty of Algebra

489 views / 0 likes - added 9 years ago

Why the abstraction of mathematics is so fundamental More free lessons at: http://www.khanacademy.org/video?v=kpCJyQ2usJ4
07:33 Popular
Ways to get a buffer solution | Chemistry | Khan Academy

1,246 views / 0 likes - added 6 years ago

Describes the two main situations where you get a buffer: making a buffer for a specific pH by combining a weak acid and a salt containing the conjugate base, and using a neutralization reaction by combining a weak acid and a strong base. Watch the next l
05:59 Popular
Introduction To Place Value | Place Value (tens And Hundreds) | Early Math | Khan Academy

1,003 views / 1 likes - added 8 years ago

Learn why we use a "ones place" and a "tens place" when writing numbers. This video uses the number 37 as an example. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/c
13:25 Popular
Linear Algebra: Another Least Squares Example

733 views / 0 likes - added 9 years ago

Using least squares approximation to fit a line to points More free lessons at: http://www.khanacademy.org/video?v=QkepM8Vv3kw
04:22 Popular
Impossible Algebra Problem

1,231 views / 0 likes - added 7 years ago

This problem is making the rounds. Can you place numbers in the four boxes so all the equations are true? Blog post (text/image explanation): http://wp.me/p6aMk-4up If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecis
07:28
Algebra: Linear Equations 1

534 views / 0 likes - added 9 years ago

equations of the form AX=B More free lessons at: http://www.khanacademy.org/video?v=bAerID24QJ0
06:07
Algebra: Linear Equations 2

479 views / 0 likes - added 9 years ago

solving equations of the form AX+B=C More free lessons at: http://www.khanacademy.org/video?v=DopnmxeMt-s
06:45
Algebra: Linear Equations 3

455 views / 0 likes - added 9 years ago

Linear equations with multiple variable and constant terms More free lessons at: http://www.khanacademy.org/video?v=Zn-GbH2S0Dk
25:34
Linear Algebra: Vector Examples

557 views / 0 likes - added 9 years ago

Visually understanding basic vector operations More free lessons at: http://www.khanacademy.org/video?v=r4bH66vYjss
10:01
Linear Algebra: 3x3 Determinant

689 views / 0 likes - added 9 years ago

Determinants: Finding the determinant of a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=0c7dt2SQfLw
18:40
Linear Algebra: nxn Determinant

630 views / 0 likes - added 9 years ago

Defining the determinant for nxn matrices. An exampled of a 4x4 determinant. More free lessons at: http://www.khanacademy.org/video?v=H9BWRYJNIv4
14:10
Linear Algebra: Determinant of Transpose

687 views / 0 likes - added 9 years ago

Proof by induction that transposing a matrix does not change its determinant More free lessons at: http://www.khanacademy.org/video?v=x-GV2v0dRNE
22:08
Linear Algebra: Orthogonal Complements

668 views / 0 likes - added 9 years ago

Orthogonal Complements as subspaces. More free lessons at: http://www.khanacademy.org/video?v=QOTjdgmNqlg
17:26
Linear Algebra: Projections onto Subspaces

687 views / 0 likes - added 9 years ago

Projections onto subspaces More free lessons at: http://www.khanacademy.org/video?v=5B8XluiqdHM
15:32
Linear Algebra: Least Squares Approximation

674 views / 0 likes - added 9 years ago

The least squares approximation for otherwise unsolvable equations More free lessons at: http://www.khanacademy.org/video?v=MC7l96tW8V8
18:50
Linear Algebra: Least Squares Examples

683 views / 0 likes - added 9 years ago

An example using the least squares solution to an unsolvable system More free lessons at: http://www.khanacademy.org/video?v=8mAZYv5wIcE
07:14 Popular
Calculating internal energy and work example | Chemistry | Khan Academy

1,087 views / 0 likes - added 6 years ago

Worked example calculating the change in internal energy for a gas using the first law of thermodynamics. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics-chemistry/internal-energy-sal/v/specific-heat-and-latent-leat-of-
07:50 Popular
pH and pKa relationship for buffers | Chemistry | Khan Academy

827 views / 0 likes - added 6 years ago

How the Henderson-Hasselbalch equation can be used to look at the ratio of conjugate acid and base using relationship between buffer pH and pKa. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/
11:47 Popular
Bond enthalpy and enthalpy of reaction | Chemistry | Khan Academy

1,145 views / 0 likes - added 6 years ago

Introduction to bond enthalpy, and how to use bond enthalpies to calculate enthalpy of reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics-chemistry/enthalpy-chemistry-sal/v/2015-ap-chemistry-free-response-7?utm_s
19:00
Linear Algebra: Basis of a Subspace

577 views / 0 likes - added 9 years ago

Understanding the definition of a basis of a subspace More free lessons at: http://www.khanacademy.org/video?v=zntNi3-ybfQ
18:53
Linear Algebra: Vector Triangle Inequality

601 views / 0 likes - added 9 years ago

Proving the triangle inequality for vectors in Rn More free lessons at: http://www.khanacademy.org/video?v=PsNidCBr5II
18:14
Linear Algebra: Matrix Product Examples

690 views / 0 likes - added 9 years ago

Example of taking the product of two matrices More free lessons at: http://www.khanacademy.org/video?v=x1z0hOyjapU
20:00
Linear Algebra: Matrix condition for one-to-one trans

692 views / 0 likes - added 9 years ago

Showing that the rank of the of an mxn transformation matrix has to be an for the transformation to be one-to-one (injective) More free lessons at: http://www.khanacademy.org/video?v=M3FuL9qKTBs
06:37
Linear Algebra: Simplifying conditions for invertibility

639 views / 0 likes - added 9 years ago

Showing that a transformation is invertible if and only if rref(A) is equal to the identity matrix More free lessons at: http://www.khanacademy.org/video?v=Yz2OosyMTmY
06:22
Linear Algebra: Example of Finding Matrix Inverse

642 views / 0 likes - added 9 years ago

Example of calculating the inverse of a matrix More free lessons at: http://www.khanacademy.org/video?v=r9aTLTN16V4
18:20
Linear Algebra: Formula for 2x2 inverse

671 views / 0 likes - added 9 years ago

Figuring out the formula for a 2x2 matrix. Defining the determinant. More free lessons at: http://www.khanacademy.org/video?v=eEUK_ThrHuQ
09:03
Linear Algebra: Determinants along other rows/cols

665 views / 0 likes - added 9 years ago

Finding the determinant by going along other rows or columns More free lessons at: http://www.khanacademy.org/video?v=nu87kfmwNfU
07:18 Popular
Linear Algebra: Rule of Sarrus of Determinants

720 views / 0 likes - added 9 years ago

A alternative "short cut" for calculating 3x3 determinants (Rule of Sarrus) More free lessons at: http://www.khanacademy.org/video?v=4xFIi0JF2AM
16:55 Popular
Linear Algebra: Determinant when row is added

915 views / 0 likes - added 9 years ago

The determinant when one matrix has a row that is the sum of the rows of other matrices (and every other term is identical in the 3 matrices) More free lessons at: http://www.khanacademy.org/video?v=VrB3LaSD_uo
08:19 Popular
Linear Algebra: Duplicate Row Determinant

712 views / 0 likes - added 9 years ago

Determinant of a matrix with duplicate rows More free lessons at: http://www.khanacademy.org/video?v=gYv8sttBIqs
10:25
Linear Algebra: Determinant after row operations

634 views / 0 likes - added 9 years ago

What happens to the determinant when we perform a row operation More free lessons at: http://www.khanacademy.org/video?v=kpG7xySkivg
08:07
Linear Algebra: Upper Triangular Determinant

655 views / 0 likes - added 9 years ago

The determinant of an upper triangular matrix More free lessons at: http://www.khanacademy.org/video?v=VX7K8iqoiRc
09:13 Popular
Linear Algebra: Simpler 4x4 determinant

703 views / 0 likes - added 9 years ago

Calculating a 4x4 determinant by putting in in upper triangular form first. More free lessons at: http://www.khanacademy.org/video?v=QV0jsTiobU4
20:10 Popular
Linear Algebra: Determinant as Scaling Factor

748 views / 0 likes - added 9 years ago

Viewing the determinant of the transformation matrix as a scaling factor of regions More free lessons at: http://www.khanacademy.org/video?v=g3MqSdO5Ubc
08:37
Linear Algebra: Transpose of a Matrix

637 views / 0 likes - added 9 years ago

Transpose of a matrix More free lessons at: http://www.khanacademy.org/video?v=2t0003_sxtU
08:41
Linear Algebra: Transposes of sums and inverses

670 views / 0 likes - added 9 years ago

Transposes of sums and inverses More free lessons at: http://www.khanacademy.org/video?v=Br_8t58mdeI
12:07
Linear Algebra: Transpose of a Vector

642 views / 0 likes - added 9 years ago

Transpose of a column vector. Matrix-matrix products using vectors More free lessons at: http://www.khanacademy.org/video?v=lSoaMCNKfAg
23:19
Linear Algebra: Rowspace and Left Nullspace

646 views / 0 likes - added 9 years ago

Rowspace and Left Nullspace More free lessons at: http://www.khanacademy.org/video?v=qBfc57x_RSg
13:04 Popular
Linear Algebra: Subspace Projection Matrix Example

772 views / 0 likes - added 9 years ago

Example of a transformation matrix for a projection onto a subspace More free lessons at: http://www.khanacademy.org/video?v=QTcSBB3uVP0
17:55 Popular
Linear Algebra: Change of Basis Matrix

719 views / 0 likes - added 9 years ago

Using a change of basis matrix to get us from one coordinate system to another. More free lessons at: http://www.khanacademy.org/video?v=1j5WnqwMdCk
19:24
Linear Algebra: The Gram-Schmidt Process

660 views / 0 likes - added 9 years ago

Finding an orthonormal basis for a subspace using the Gram-Schmidt Process More free lessons at: http://www.khanacademy.org/video?v=rHonltF77zI
13:14
Linear Algebra: Gram-Schmidt Process Example

647 views / 0 likes - added 9 years ago

Using Gram-Schmidt to find an orthonormal basis for a plane in R3 More free lessons at: http://www.khanacademy.org/video?v=tu1GPtfsQ7M
14:34 Popular
Linear Algebra: Finding Eigenvectors and Eigenspaces example

714 views / 0 likes - added 9 years ago

Finding the eigenvectors and eigenspaces of a 2x2 matrix More free lessons at: http://www.khanacademy.org/video?v=3-xfmbdzkqc
11:34 Popular
Algebra Basics: What Are Functions? - Math Antics

2,144 views / 3 likes - added 7 years ago

Learn More at mathantics.com Visit http://www.mathantics.com for more Free math videos and additional subscription based content!
06:13 Popular
Rate constant k from half-life example | Knetics | Chemistry | Khan Academy

921 views / 0 likes - added 6 years ago

Example problem showing how to find the rate constant k from the half-life of a first order reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/copy-of-kinetics/v/second-order-reaction-with-calculus?utm_source=YT&u
13:20
Linear Algebra: Determinant when row multiplied by scalar

639 views / 0 likes - added 9 years ago

The determinant when a row is multiplied by a scalar More free lessons at: http://www.khanacademy.org/video?v=32rdijPB-rA
02:52 Popular
Linear Algebra: (correction) scalar muliplication of row

989 views / 0 likes - added 9 years ago

Correction of last video showing that the determinant when one row is multiplied by a scalar is equal to the scalar times the determinant More free lessons at: http://www.khanacademy.org/video?v=WY6QG0mZ7uQ
21:38 Popular
Linear Algebra: Determinant and area of a parallelogram

1,260 views / 0 likes - added 9 years ago

Realizing that the determinant of a 2x2 matrix is equal to the area of the parallelogram defined by the column vectors of the matrix More free lessons at: http://www.khanacademy.org/video?v=n-S63_goDFg
08:50
Linear Algebra: Transpose of a Matrix Product

664 views / 0 likes - added 9 years ago

Taking the transpose of the product of two matrices More free lessons at: http://www.khanacademy.org/video?v=UdHgWK13x5I
16:08
Linear Algebra: Coordinates with Respect to a Basis

655 views / 0 likes - added 9 years ago

Understanding alternate coordinate systems More free lessons at: http://www.khanacademy.org/video?v=uvgru6FcyxU
15:28 Popular
Linear Algebra: Coordinates with respect to orthonormal bases

764 views / 0 likes - added 9 years ago

Seeing that orthonormal bases make for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=SWbis2zWIvo
09:19 Popular
Linear Algebra: Proof of formula for determining Eigenvalues

720 views / 0 likes - added 9 years ago

Proof of formula for determining Eigenvalues More free lessons at: http://www.khanacademy.org/video?v=rfm0wQObxjk
14:08
Linear Algebra: Eigenvalues of a 3x3 matrix

689 views / 0 likes - added 9 years ago

Determining the eigenvalues of a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=11dNghWC4HI
12:01 Popular
Algebra Basics: Slope And Distance - Math Antics

1,176 views / 1 likes - added 4 years ago

Learn More at mathantics.comVisit http://www.mathantics.com for more Free math videos and additional subscription based content!
13:46 Popular
Algebra Basics: Laws Of Exponents - Math Antics

1,890 views / 1 likes - added 3 years ago

This is a re-upload to correct a minor math typo.Learn More at mathantics.comVisit http://www.mathantics.com for more Free math videos and additional subscription based content!
05:53
Comparing Q vs K example | Chemical equilibrium | Chemistry | Khan Academy

573 views / 0 likes - added 6 years ago

A worked example using reaction quotient Q to predict how concentrations will shift so the reaction can get to equilibrium. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/acids-and-bases/v/arrhenius-definition-o
16:34 Popular
Linear Algebra: Exploring the solution set of Ax=b

1,845 views / 0 likes - added 9 years ago

Exploring the solution set of Ax=b (non homogeneous equations) More free lessons at: http://www.khanacademy.org/video?v=1PsNIzUJPkc
18:00
Linear Algebra: Deriving a method for determining inverses

629 views / 0 likes - added 9 years ago

Determining a method for constructing inverse transformation matrices More free lessons at: http://www.khanacademy.org/video?v=6DpzCKJBsz0
13:57
Linear Algebra: Gram-Schmidt example with 3 basis vectors

692 views / 0 likes - added 9 years ago

Gram-Schmidt example with 3 basis vectors More free lessons at: http://www.khanacademy.org/video?v=ZRRG386v6DI
05:39
Linear Algebra: Example solving for the eigenvalues of a 2x2 matrix

695 views / 0 likes - added 9 years ago

Example solving for the eigenvalues of a 2x2 matrix More free lessons at: http://www.khanacademy.org/video?v=pZ6mMVEE89g

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