Search Results: "Inequality Word Problem: One Variable | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy"

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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
03:28 Popular
Inequality Word Problems | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,602 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
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
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/
00:52 Popular
Reading Bar Charts: Basic Example | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,369 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/
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
03:52 Popular
Converting From Decimal To Binary | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,508 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
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
03:40 Popular
Multi-step Word Problem With Decimals And Subtraction | Pre-Algebra | Khan Academy

1,565 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
03:21 Popular
Rational Number Word Problem With Fractions | Pre-Algebra | Khan Academy

1,705 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
04:20
Analyzing Two Variable Linear Inequality

649 views / 0 likes - added 8 years ago

Analyzing two variable linear inequality
02:49 Popular
Percent Word Problem Example 2 | Decimals | Pre-Algebra | Khan Academy

1,171 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
02:08 Popular
Subtraction / Subtracting Integers - Word Problem

909 views / 0 likes - added 8 years ago

Subtraction / Subtracting Integers - Word Problem. Here I look at a little word problem dealing with adding and subtracting integers.
05:03 Popular
Systems Word Problem With No Solution

1,283 views / 0 likes - added 8 years ago

Systems word problem with no solution
04:35
Surface area word problem example

693 views / 0 likes - added 6 years ago

Surface area word problem example
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.
04:09 Popular
Easy algebra word problem - But can you solve it?

1,431 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

1,856 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
05:09
Subtraction Word Problem

553 views / 0 likes - added 9 years ago

u01_l2_t2_we3 Subtraction Word Problem Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
11:06
Word Problem Solving 3

587 views / 0 likes - added 9 years ago

Word problem solving strategies from chapter 3 of ck12.org Algebra I book
10:05
Word Problem Solving 4

549 views / 0 likes - added 9 years ago

Word Problem Solving 4 More free lessons at: http://www.khanacademy.org/video?v=5EdbPz1ZVn0
08:34 Popular
LCM And GCF Word Problems | Factors And Multiples | Pre-Algebra | Khan Academy

1,793 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
07:22
Word Problem Solving- Exponential Growth and Decay

684 views / 0 likes - added 9 years ago

Word Problem Solving- Exponential Growth and Decay More free lessons at: http://www.khanacademy.org/video?v=m5Tf6vgoJtQ
08:02
Algebraic Word Problem

559 views / 0 likes - added 9 years ago

U02_L1_T3_we1 : Algebraic Word Problem More free lessons at: http://www.khanacademy.org/video?v=cNlwi6lUCEM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:39
Multiplying Fractions Word Problem

627 views / 0 likes - added 9 years ago

U02_L2_T1_we4 Multiplying Fractions Word Problem More free lessons at: http://www.khanacademy.org/video?v=YJgIGwTysk0 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:08
Dividing Fractions Word Problem

551 views / 0 likes - added 9 years ago

U02_L2_T3_we5 Dividing Fractions Word Problem More free lessons at: http://www.khanacademy.org/video?v=PQsgXNggV7Q Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:19
Subtracting Decimals Word Problem

533 views / 0 likes - added 9 years ago

U03_L2_T1_we3 Subtracting Decimals Word Problem More free lessons at: http://www.khanacademy.org/video?v=hy_bDS3aHO4 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:22 Popular
Adding Mixed Numbers Word Problem

708 views / 0 likes - added 9 years ago

U02_L3_T1_we5 Adding Mixed Numbers Word Problem More free lessons at: http://www.khanacademy.org/video?v=o0arqcKC7QE Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:41 Popular
Subtracting Mixed Numbers Word Problem

897 views / 0 likes - added 9 years ago

U02_L3_T2_we4 Subtracting Mixed Numbers Word Problem More free lessons at: http://www.khanacademy.org/video?v=tj9oLZYA-AQ Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
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
10:16 Popular
Income And Wealth Inequality: Crash Course Economics

892 views / 0 likes - added 8 years ago

Inequality is a big, big subject. There's racial inequality, gender inequality, and lots and lots of other kinds of inequality. This is Econ, so we're going to talk about wealth inequality and income inequality. There's no question that economic inequalit
04:31 Popular
Number Patterns: Interpreting Relationships | Pre-Algebra | Khan Academy

1,534 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
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
10:00
Introduction To Number Systems And Binary | Pre-Algebra | Khan Academy

608 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.
03:43 Popular
Converting From Decimal To Hexadecimal Representation | Pre-Algebra | Khan Academy

1,426 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
04:59
Interpreting Visual Linear Inequality

494 views / 0 likes - added 8 years ago

Interpreting visual linear inequality
03:42
Understanding Linear Inequality With Two Variables

470 views / 0 likes - added 8 years ago

Understanding linear inequality with two variables
05:55
Values To Make Absolute Value Inequality True

637 views / 0 likes - added 9 years ago

Values to make absolute value inequality true
03:35
Answering Question From Visual Inequality System

601 views / 0 likes - added 8 years ago

Answering question from visual inequality system
02:22
Setting Up A Linear Inequality In Two Variables

510 views / 0 likes - added 8 years ago

Setting up a linear inequality in two variables
12:52
Word Problem Solving Strategies

548 views / 0 likes - added 9 years ago
04:21 Popular
Basic Trigonometry - Word Problem

716 views / 0 likes - added 8 years ago

Learn basic trigonometry with this easy to follow example. I also provided the links for other basic trigonometry videos as well. Basic trigonometry quiz: https://www.youtube.com/watch?v=IGV1XufPd6E Basic Trigonometry Practice Question #1: https://www.you
10:12
Word Problem Solving Plan 1

473 views / 0 likes - added 9 years ago
12:20
Problem Solving Word Problems 2

550 views / 0 likes - added 9 years ago

More free lessons at: http://www.khanacademy.org/video?v=s1QN7sSfBM8
06:50
Is inequality inevitable?

148 views / 0 likes - added 1 year ago

Explore how economic inequality can be measured and how it is impacted by different governmental policy choices.--Income and wealth inequality are not new. In fact, economists and historians who have charted economic inequality throughout history havent f
16:56 Popular
Proof of the Cauchy-Schwarz Inequality

727 views / 0 likes - added 9 years ago

Proof of the Cauchy-Schwarz Inequality More free lessons at: http://www.khanacademy.org/video?v=r2PogGDl8_U
04:58
Using Proportion To Solve For Variable

554 views / 0 likes - added 8 years ago

Using proportion to solve for variable
35:37
Quantum Entanglement, Bell Inequality, EPR paradox

486 views / 0 likes - added 5 years ago

Quantum Entanglement, EPR paradox, Bell Inequality, and the implication for Einstein's Theory of Relativity.
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
04:12
Constraining Solutions To Two Variable Linear Inequalities

666 views / 0 likes - added 8 years ago

Constraining solutions to two variable linear inequalities
04:12
Applying Logarithms

448 views / 0 likes - added 9 years ago

u18_l4_t2_we1 Applying Logarithms
02:21
Inductive Reasoning 2

483 views / 0 likes - added 9 years ago

U12_L1_T3_we2 Inductive Reasoning 2 More free lessons at: http://www.khanacademy.org/video?v=ZSsBh4Ybbj8 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:03
Inductive Reasoning 3

509 views / 0 likes - added 9 years ago

U12_L1_T3_we3 Inductive Reasoning 3 More free lessons at: http://www.khanacademy.org/video?v=pgfWkaySFGY Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:00
Deductive Reasoning 1

535 views / 0 likes - added 9 years ago

U12_L1_T4_we1 Deductive Reasoning 1 More free lessons at: http://www.khanacademy.org/video?v=GEId0GonOZM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:57
Deductive Reasoning 2

519 views / 0 likes - added 9 years ago

U12_L1_T4_we2 Deductive Reasoning 2 More free lessons at: http://www.khanacademy.org/video?v=VMEV__2wW3E Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:11
Deductive Reasoning 3

545 views / 0 likes - added 9 years ago

U12_L1_T4_we3 Deductive Reasoning 3 More free lessons at: http://www.khanacademy.org/video?v=lYLaaMObgkw Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:28
Applying Logarithms 2

442 views / 0 likes - added 9 years ago

u18_l4_t2_we2 Applying Logarithms 2
08:02 Popular
3-variable linear equations (part 1)

711 views / 0 likes - added 9 years ago

Visual intuition of a 3-variable linear equation.
05:06
Solutions to Three Variable System

453 views / 0 likes - added 9 years ago

u14 l3 t1 we4 Solutions to Three Variable System More free lessons at: http://www.khanacademy.org/video?v=145zOBT0LD4
02:07
U12_L1_T3_we1 Inductive Reasoning 1

429 views / 0 likes - added 9 years ago

U12_L1_T3_we1 Inductive Reasoning 1 More free lessons at: http://www.khanacademy.org/video?v=MnQ7Lizkpqk Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:23
Applying Einstein Velocity Addition

593 views / 0 likes - added 8 years ago

Applying Einstein velocity addition
02:35 Popular
Dividing Whole Numbers And Fractions: Studying | Fractions | Pre-Algebra | Khan Academy

2,045 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
11:49
Fixed, Variable, and Marginal Cost.

535 views / 0 likes - added 9 years ago

Thinking about average fixed, variable and marginal cost More free lessons at: http://www.khanacademy.org/video?v=bBQVaRnHqLs
32:44 Popular
The Power of Mathematical Visualization | The Great Courses

1,060 views / 0 likes - added 7 years ago

https://www.thegreatcoursesplus.com/show/the_power_of_mathematical_visualization?utm_source=US_SocialMedia&utm_medium=SocialMediaEditorialYoutube&utm_campaign=138569 The Power of Mathematical Visualization teaches you these vital problem-solving skills in
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
16:55
How Economic Inequality Harms Societies - Richard Wilkinson

625 views / 0 likes - added 8 years ago

We feel instinctively that societies with huge income gaps are somehow going wrong. Richard Wilkinson charts the hard data on economic inequality, and shows what gets worse when rich and poor are too far apart: real effects on health, lifespan, even such
01:24
Solving for a Variable

425 views / 0 likes - added 9 years ago

u15_l3_t1_we1 Solving for a Variable More free lessons at: http://www.khanacademy.org/video?v=fnuIT7EhAvs Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:58
Example of Solving for a Variable

457 views / 0 likes - added 9 years ago

U02_L1_T4_we1 : Example of solving for a variable More free lessons at: http://www.khanacademy.org/video?v=Aig1hkq3OsU Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
15:38
Proof: S (or Entropy) is a valid state variable

515 views / 0 likes - added 9 years ago

Prroof that S (or entropy) is a valid state variable. More free lessons at: http://www.khanacademy.org/video?v=sPz5RrFus1Q
02:02
Application problems with equation in one variable

551 views / 0 likes - added 9 years ago

u10_l1_t3_we2 Application problems with equation in one variable More free lessons at: http://www.khanacademy.org/video?v=iimpwYBiKNg Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:41
Solving for a Variable 2

410 views / 0 likes - added 9 years ago

U02_L1_T4_we2 : Solving for a Variable 2 More free lessons at: http://www.khanacademy.org/video?v=BR5yFOt0zao Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:39
Applying Quadratic Functions 1

547 views / 0 likes - added 9 years ago

U10_L2_T1_we1 Applying Quadratic Functions 1 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
09:43
Applying Quadratic Functions 2

460 views / 0 likes - added 9 years ago

U10_L2_T1_we2 Applying Quadratic Functions 2 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:46
Applying Quadratic Functions 3

506 views / 0 likes - added 9 years ago

U10_L2_T1_we3 Applying Quadratic Functions 3 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:17 Popular
Solving Percent Problems | Decimals | Pre-Algebra | Khan Academy

878 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
02:32 Popular
Dividing Whole Numbers And Fractions: Potpourri | Fractions | Pre-Algebra | Khan Academy

1,726 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
04:51
Applying the Quadratic Formula

478 views / 0 likes - added 9 years ago

u16_l5_t2_we2 Applying the Quadratic Formula More free lessons at: http://www.khanacademy.org/video?v=_E3gx_yQhHQ Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:25
Applying Radical Equations 1

592 views / 0 likes - added 9 years ago

U07_L3_T3_we1 Applying Radical Equations 1 More free lessons at: http://www.khanacademy.org/video?v=U3JxFFdKCKM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:20
Applying Radical Equations 3

473 views / 0 likes - added 9 years ago

U07_L3_T3_we3 Applying Radical Equations 3 More free lessons at: http://www.khanacademy.org/video?v=npUtXLjTnxg Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:26
Applying Rational Equations 1

471 views / 0 likes - added 9 years ago

U11_L2_T2_we1 Applying Rational Equations 1 More free lessons at: http://www.khanacademy.org/video?v=gD7A1LA4jO8 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:00
Applying Rational Equations 2

483 views / 0 likes - added 9 years ago

U11_L2_T2_we2 Applying Rational Equations 2 More free lessons at: http://www.khanacademy.org/video?v=E1j8W64NQ0Y Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
07:59
Applying Rational Equations 3

448 views / 0 likes - added 9 years ago

U11_L2_T2_we3 Applying Rational Equations 3 More free lessons at: http://www.khanacademy.org/video?v=B0Z4s38YIgQ Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
06:56
Applying Radical Equations 2

520 views / 0 likes - added 9 years ago

U07_L3_T3_we2 Applying Radical Equations 2 More free lessons at: http://www.khanacademy.org/video?v=YghRP8S2K-4 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:32 Popular
Math Word problems - Solving triangles

1,300 views / 0 likes - added 7 years ago

Become an expert in solving math word problems! In this problem you will learn how to use triangles to solve the height of a building. A man steps back 50 feet which the angle to the top of the building change 15 degrees. Using this information find the h
04:50 Popular
The Mathematical Secrets Of Pascal’s Triangle - Wajdi Mohamed Ratemi

1,690 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/the-mathematical-secrets-of-pascal-s-triangle-wajdi-mohamed-ratemi Pascal’s triangle, which at first may just look like a neatly arranged stack of numbers, is actually a mathematical treasure trove. But what abo
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09:43 Popular
How To Argue - Philosophical Reasoning: Crash Course Philosophy #2

885 views / 0 likes - added 8 years ago

Before we dive into the big questions of philosophy, you need to know how to argue properly. We’ll start with an overview of philosophical reasoning and breakdown of how deductive arguments work (and sometimes don’t work). -- Images and video via VideoBlo
05:42 Popular
Understanding Division Of Fractions | Fractions | Pre-Algebra | Khan Academy

1,206 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/
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
05:04 Popular
Area of a Triangle - Fun challenging math problem

2,109 views / 0 likes - added 7 years ago

Can you solve the area of a triangle given points X and Y. This is not a basic problem, but it is a fun and challenging math problem. See if you are smart enough to find the area of a triangle for yourself. My name is Chris and my passion is to teach math
03:45 Popular
Visualizing Equivalent Fractions | Fractions | Pre-Algebra | Khan Academy

1,083 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
02:22 Popular
Science Of Why People Hate The Word 'Moist'

744 views / 1 likes - added 5 years ago

Moist is one of the most disliked words in the world. People compare hearing the word moist to hearing nails on a chalkboard. What is it about this word that causes people to have such a strong reaction? Tech Insider tells you all you need to know about t
03:33 Popular
Finding A Percentage | Decimals | Pre-Algebra | Khan Academy

1,245 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
07:37
Why This Problem is IMPOSSIBLE for Computers to Solve (The Halting Problem)

472 views / 0 likes - added 5 years ago

Start learning today with SkillShare: https://skl.sh/upandatom2 The quantum computer game I talked about: https://phys.cam/game/ Alan Turing proved that the Halting Problem was impossible for Turing machines (computers) to solve. Come find out how. Hi! I'
07:11 Popular
Graphing Solutions To Two-variable Linear Equations Example 2 | Algebra I | Khan Academy

1,987 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
05:24 Popular
Math Challenge - Shrinking Pool Problem

1,187 views / 0 likes - added 7 years ago

Think you can solve this math challenge? Every time a boy jumps into the pool it shrinks by a certain amount. Thy boy jumps into the pool 3 times. You must find the original length of the pool My name is Chris and my passion is to teach math. Learning sho
01:31
Houston's 'We Have a Problem' Problem

537 views / 0 likes - added 6 years ago

The often misquoted line from Apollo 13 astronauts--"Houston, we've had a problem"--comes up a lot in everyday life, and that annoys a lot of Houstonians. Photo: NASA Don’t miss a WSJ video, subscribe here: http://bit.ly/14Q81Xy More from the Wall Street
02:35
Is The Universe Entirely Mathematical? Feat. Max Tegmark

597 views / 0 likes - added 8 years ago

Thanks to Max Tegmark for writing & narrating this video, you can listen to his new book at http://www.audible.com/minutephysics OR find it on Amazon http://www.amazon.co.uk/Our-Mathematical-Universe-Ultimate-Reality/dp/1846144760 Thanks to Radiolab for l
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
47:52 Popular
How Not To Be Wrong: The Power Of Mathematical Thinking

872 views / 0 likes - added 8 years ago

The maths we learn in school can seem like a dull set of rules, laid down by the ancients and not to be questioned. Jordan Ellenberg shows how wrong this view is through stories that show the power of mathematical thinking. Subscribe for regular science v
06:20 Popular
Greatest Common Factor Explained | Factors And Multiples | Pre-Algebra | Khan Academy

1,168 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/
08:21 Popular
Two-variable Linear Equations And Their Graphs | Algebra I | Khan Academy

1,986 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
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Is Our Climate Headed For A Mathematical Tipping Point? - Victor J. Donnay

631 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/is-our-climate-headed-for-mathematical-chaos-victor-j-donnay Scientists have warned that as CO2 levels in the atmosphere rise an increase in Earth’s temperature by even two degrees could lead to catastrophic eff
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Mathematical Magic - Mr. Wizard's Everyday Magic

166 views / 1 likes - added 1 year ago

Learn some mathematical magic from Mr. Wizard. Subscribe now for more science, nature and technology clips from the 1980's Nickelodeon show, Mr. Wizard's World, every week on #WizardWednesdays. SUBSCRIBE HERE: http://bit.ly/mrwizard
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=
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
04:14 Popular
Can One Mathematical Model Explain All Patterns In Nature?

712 views / 0 likes - added 7 years ago

All patterns in nature might be describable using this mathematical theory. How did Alan Turing influence how we see the natural world? Who Was Ada Lovelace, The World's First Computer Nerd? - http://bit.ly/290mnkb Sign Up For The Seeker Newsletter Here -
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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
What's the Longest Word? | Otherwords

212 views / 0 likes - added 2 years ago

For more word-nerdery, subscribe to Storied!: http://bit.ly/pbsstoried_subBefore we decide from a long list of contenders, we'll have to figure out what the word "word" really means...Otherwords is a new PBS web series on Storied that digs deep into this
03:03 Popular
Introduction To Exponents | Pre-Algebra | Khan Academy

1,505 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
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
03:21 Popular
Introduction To Perimeter | Measurement | Pre-Algebra | Khan Academy

782 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
04:42 Popular
How To Write Algebraic Expressions From Word Problems | 6th Grade | Khan Academy

1,266 views / 0 likes - added 8 years ago

Learn how to write expressions with variables to describe situations described in word problems. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-alg-e
20:48 Popular
Introduction To Scientific Notation | Pre-Algebra | Khan Academy

1,899 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
03:09 Popular
How To Write Basic Algebraic Expressions From Word Problems | 6th Grade | Khan Academy

938 views / 0 likes - added 8 years ago

Learn how to write basic expressions with variables to describe situations described in word problems. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th
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
12:27
Variable Expressions

413 views / 0 likes - added 9 years ago

More free lessons at: http://www.khanacademy.org/video?v=aoXUWSwiDzE
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
09:17 Popular
Unit Conversion Within The Metric System | Pre-Algebra | Khan Academy

1,823 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
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?
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

1,852 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
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Multiplying Fractions Word Problems (ex 1)

676 views / 0 likes - added 9 years ago

Multiplying Fractions Word Problems (ex 1)
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Fraction word problems 1 (ex 4)

541 views / 0 likes - added 9 years ago

Fraction word problems 1 (ex 4)
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Fraction word problems 1 (ex 3)

579 views / 0 likes - added 9 years ago

Fraction word problems 1 (ex 3)
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Fraction word problems 1 (ex 2)

558 views / 0 likes - added 9 years ago

Fraction word problems 1 (ex 2)
03:55 Popular
Interpreting Function Graphs Word Problems

925 views / 0 likes - added 8 years ago

Interpreting function graphs word problems
01:34 Popular
Solving Ratio Problems With Graph | Pre-Algebra | Khan Academy

1,882 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
04:43
The magical, mathematical fictions of Jorge Luis Borges - Ilan Stavans

389 views / 0 likes - added 4 years ago

Dive into the mind-bending works of Argentinian writer Jorge Luis Borges, whose work pioneered the literary style magical realism.--What would it be like to have a limitless memory? Can the meaning of life be found in an infinite library? Is time a labyri
03:00 Popular
Inverse Property Of Addition | Arithmetic Properties | Pre-Algebra | Khan Academy

1,728 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
02:19
Word Origins Hiding In Plain Sight

467 views / 0 likes - added 8 years ago

Sometimes the etymology of a word is right in front of us, and we don't even see it.
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Can You Find The Hidden Variable?

130 views / 0 likes - added 1 year ago

I show how this works in this video: https://youtu.be/e0GhlCzLmN4Subscribe to my main channel here: https://www.youtube.com/c/TheActionLab#shorts
09:50 Popular
Adding And Subtracting Fractions | Fractions | Pre-Algebra | Khan Academy

2,068 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
04:17 Popular
Introduction To Area And Unit Squares | Measurement | Pre-Algebra | Khan Academy

1,544 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
04:33 Popular
Multiplying Negative And Positive Fractions | Fractions | Pre-Algebra | Khan Academy

872 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_
03:53 Popular
Plotting Basic Fractions On The Number Line | Fractions | Pre-Algebra | Khan Academy

1,362 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
01:11 Popular
Subtracting Decimals: Example 1 | Decimals | Pre-Algebra | Khan Academy

1,083 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
05:51 Popular
Equivalent Fractions | Fractions | Pre-Algebra | Khan Academy

2,071 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
06:29 Popular
Multiplying Decimals: Place Value And Reordering | Decimals | Pre-Algebra | Khan Academy

1,381 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

1,888 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/
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
09:23 Popular
Converting Fractions To Decimals | Decimals | Pre-Algebra | Khan Academy

2,077 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
04:16 Popular
Least Common Multiple Exercise | Factors And Multiples | Pre-Algebra | Khan Academy

1,134 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
09:15 Popular
Mixed Numbers And Improper Fractions | Fractions | Pre-Algebra | Khan Academy

1,743 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
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
01:03 Popular
Subtraction Word Problems Within 10 | Basic Addition And Subtraction | Early Math | Khan Academy

753 views / 0 likes - added 8 years ago

Learn how to solve word problems by subtracting small numbers (numbers 10 or less). 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-word-problem-wit
04:20 Popular
Dividing A Whole Number By A Decimal | Decimals | Pre-Algebra | Khan Academy

1,702 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
09:29 Popular
Dividing Decimals With Hundredths Example 3 | Decimals | Pre-Algebra | Khan Academy

1,075 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
01:42 Popular
Addition Word Problems Within 10 | Basic Addition And Subtraction | Early Math | Khan Academy

849 views / 1 likes - added 8 years ago

Learn how to solve word problems by adding small numbers (numbers 10 or less). 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-word-problem-within-1
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
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
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

1,596 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
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The Easiest Problem Everyone Gets Wrong

356 views / 0 likes - added 2 years ago

Watch my newest video, "Could a Toothpaste Sandwich Brush Your Teeth?": https://youtu.be/OdeiWhETqQYWe know how difficult the Monty Hall Problem is for so many people even after theyre shown all the math behind the best possible strategy. Its basic probab
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
04:30 Popular
Calculus Limits - Easy Problem and Introduction

1,247 views / 0 likes - added 7 years ago

Learning Calculus limits is a breeze with this problem and introduction. This example is an easy problem. Check out my Calculus limits playlist if you want some harder examples. I also offer live tutoring if you need any extra help. Check out my website i
08:30 Popular
Multiplying And Dividing Negative Numbers | Pre-Algebra | Khan Academy

1,784 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
08:49
The Insane Scale of Global Wealth Inequality Visualized

588 views / 0 likes - added 5 years ago

Watch anything on CuriosityStream for free by going to https://www.curiositystream.com/reallifelore and by using the code reallifelore during the sign up. Get RealLifeLore T-shirts here: http://standard.tv/reallifelore Please Subscribe: http://bit.ly/2dB7
05:10
Mathematical Closure

512 views / 0 likes - added 8 years ago

Understanding what it means for a set to be closed under an operation.
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The Centrifuge Problem - Numberphile

553 views / 0 likes - added 5 years ago

More videos with Dr Holly Krieger: http://bit.ly/HollyKrieger More links & stuff in full description below ↓↓↓ Dr Holly Krieger is based at Murray Edwards College, University of Cambridge. Want some chemistry videos? Brady does those too: https://www.yout
14:13 Popular
Introduction To Ratios | Ratios, Proportions, Units, And Rates | Pre-Algebra | Khan Academy

1,899 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
04:29
Mathematical Present Wrapping

604 views / 0 likes - added 8 years ago

Mathematician Katie Steckles takes you through some mathematically satisfying ways to wrap presents using paper.
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03:59 Popular
Volume Word Problems — Basic Example | Math | New SAT | Khan Academy

1,020 views / 0 likes - added 8 years ago

Watch Sal work through a basic Volume word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s1-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous
08:31
The Penny Problem That Breaks Your Brain

490 views / 0 likes - added 2 years ago

Get the Vsauce Curiosity Box: https://www.curiositybox.com/Your mind is a massive collection of information, patterns, trivia, algorithms, and more -- and you have absolutely no idea how or when any of it is going to be useful. If youve got 50 stacks of 5
14:06
The Mathematical Code Hidden In Nature

186 views / 0 likes - added 2 years ago

Check out MEGAWOW from @PBS KIDS https://youtu.be/meU4f31gqYIWere on PATREON! Join the community https://www.patreon.com/itsokaytobesmart More info and sources below How do zebras get their stripes? How do leopards get their spots? And how do giraffes get
04:51 Popular
Cube Root Of A Non-perfect Cube | Pre-Algebra | Khan Academy

1,267 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
10:19
The Most Controversial Problem in Philosophy

104 views / 0 likes - added 4 months ago

For decades, the Sleeping Beauty Problem has divided people between two answers. Head to https://brilliant.org/veritasium to start your free 30-day trial, and the first 200 of you will get 20% off an annual premium subscription.Many thanks to Dr. Mike Tit
09:45 Popular
Simplifying Radicals | Exponents, Radicals, And Scientific Notation | Pre-Algebra | Khan Academy

1,521 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
07:14 Popular
Negative Exponents | Exponents, Radicals, And Scientific Notation | Pre-Algebra | Khan Academy

1,569 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
07:16 Popular
How To Draw The Word Art (Simple Graffiti Style) + Challenge Time

908 views / 0 likes - added 5 years ago

Learn how to draw the word art in simple graffiti style! Plus, stay until the end for this week's CHALLENGE TIME! #howtodraw #artforkidshub
13:58
The Josephus Problem - Numberphile

638 views / 0 likes - added 7 years ago

The Josephus Problem, featuring Daniel Erman from University of Wisconsin-Madison. Winning at Dots and Boxes: https://youtu.be/KboGyIilP6k NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Number
13:54 Popular
Kakeya's Needle Problem - Numberphile

922 views / 0 likes - added 8 years ago

The famed Kakeya Needle Problem, discussed by Charles Fefferman from Princeton University. Edit and animation by Pete McPartlan Film and interview by Brady Haran 17-gon: https://youtu.be/87uo2TPrsl8 NUMBERPHILE Website: http://www.numberphile.com/ Numberp
16:51 Popular
Euclid's Big Problem - Numberphile

910 views / 0 likes - added 8 years ago

Trisecting angles and calculating cube roots was a big problem for Euclid and his cohorts. Discussed by Zsuzsanna Dancso at MSRI. TRISECT WITH ORIGAMI: http://youtu.be/SL2lYcggGpc CIRCLE THE SQUARE: http://youtu.be/CMP9a2J4Bqw NUMBERPHILE Website: http://
07:04
The 8 Queen Problem - Numberphile

557 views / 0 likes - added 8 years ago

Our thanks to lynda.com - use our link: http://www.lynda.com/numberphile Dr James Grime discusses a famous chess problem - placing eight queens "safely" on a chess board. Some extra footage from this video will appear on Numberphile2 next Monday... https:
01:44
Three Word Puzzles

658 views / 0 likes - added 5 years ago

Three puzzles will test your word power with the English language. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://www.facebook.com/CuriosityShow Twitter ➤ https://twitter.com/Curios
09:36 Popular
Negative Numbers Introduction | Negative Numbers And Absolute Value | Pre-Algebra | Khan Academy

2,160 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.
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Sesame Street: Reir (Laugh) | Spanish Word of the Day #3

205 views / 0 likes - added 2 years ago

Today's Spanish Word of the Day is Reir! Rosita has Elmo demonstrate today's word by tickling him with a feather! Can you guess what reir means? Reir means to laugh in Spanish!--Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscript
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Sesame Street: Galleta (Cookie) | Spanish Word of the Day #2

445 views / 0 likes - added 2 years ago

Rosita is teaching Elmo today's Spanish Word of the Day: Galleta. But Cookie Monster already knows what this word means because it's his favorite in Spanish or English! Can you guess what it is? Galleta means Cookie in Spanish!--Subscribe to the Sesame St
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Sesame Street: Cantar (Sing) | Spanish Word of the Day #1

368 views / 0 likes - added 2 years ago

It's time for the Spanish Word of the Day! Rostia shares with Elmo and Cookie Monster that today's word is Cantar. Cantar means "Sing" in Spanish! Sing after Rosita with Elmo and Cookie in Sing After Me!--Subscribe to the Sesame Street Channel here: http:
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That Viral Math Problem (Cheryl's Birthday) - Numberphile

734 views / 0 likes - added 8 years ago

Simon Pampena gives his take on THAT viral math problem from Singapore. EXTRA FOOTAGE for this video: http://youtu.be/Mj-YngjjpJg Simon on Twitter: https://twitter.com/mathemaniac NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: h
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Comparison Word Problems | Addition And Subtraction Within 20 | Early Math | Khan Academy

913 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-word-problems-more-fewer-20/e/addition-and-subtraction-word-problems-within-20--level-3?utm_source=YT&utm_medium
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Sesame Street: Show Resilience with Rosie Perez | #ComingTogether Word of the Day

93 views / 0 likes - added 1 year ago

The Word of the Day is Resilience! Rosie Perez teaches Grover about resilience as they get ready to go roller skating together! Resilience is when we have strength on the inside, and it helps us move forward when things go wrong. This word helps Grover mo
05:44 Popular
Sesame Street: Sturdy (Word on the Street Podcast)

858 views / 0 likes - added 9 years ago

What does the word sturdy mean? What kind of things can be sturdy? Should a house be sturdy? A Bridge? Your dad? Lots of thing must be (and are) sturdy. Watch this word on the street podcast and your understanding of the word sturdy will be quite, well, s
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Limiting Reactant Example Problem 1

632 views / 0 likes - added 9 years ago

Limiting Reactant Example Problem 1
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The Illumination Problem - Numberphile

544 views / 0 likes - added 5 years ago

Featuring Professor Howard Masur from the University of Chicago. Filmed at the Mathematical Sciences Research Institute (MSRI). Part 2 of this interview: https://youtu.be/AGX0cLbHaog Patreon: http://www.patreon.com/numberphile Numberphile is supported by
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Clarence | Jeff's Word of the Day: Brevity | Cartoon Network | CN Mini

746 views / 0 likes - added 5 years ago

Take a lesson from Jeff and learn a new word to use in your everyday life! Today's word: Brevity. CN GAMES: http://cartn.co/ytgames SUBSCRIBE: http://cartn.co/subscribe About Cartoon Network: Welcome to Cartoon Network's YouTube Channel, your destination
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Radical Equation Application Problem

582 views / 0 likes - added 9 years ago

u16_l3_t1_we3 Radical Equation Application Problem
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Urban planners aim to eliminate slums—with a mathematical approach

564 views / 0 likes - added 5 years ago

Researchers are testing a tool based on a "topological view" of cities and slums to improve the design of growing urban areas Read the story: https://scim.ag/2Nv8Gw1 Read the paper (free): http://advances.sciencemag.org/content/4/8/eaar4644 CREDITS ------
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Sesame Street: Sunny Days Word Mashup | #Sesame50

619 views / 0 likes - added 5 years ago

Do you know every word to Sesame Street's Sunny Days theme song? Get ready to sing Sunny Days in a new special way with this word mashup! Follow along with the lyrics below: Sunny Day Sweepin' the clouds away On my way to where the air is sweet Can you te
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The Sun Blocker | What's Your Problem?

363 views / 0 likes - added 4 years ago

AJ finds it annoying that he can't reach his own back when applying sunscreen, so Joseph and his team make a machine to do it automatically. What's Your Problem? is a new series in which Joseph and his team solve really annoying problems by making hilario
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"Weird Al" Yankovic - Word Crimes

544 views / 1 likes - added 3 years ago

"Weird Al" Yankovic's new album "Mandatory Fun" out now on iTunes: http://smarturl.it/MandatoryFun Amazon: http://smarturl.it/MandatoryFunAMZ Google Play: http://smarturl.it/MandatoryFunGP http://www.WeirdAl.com Music video by "Weird Al" Yankovic performi
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The Mind Body Problem

622 views / 0 likes - added 7 years ago

The Mind-Body problem is one of the greatest conundrums of philosophy and of our everyday lives too. FURTHER READING “The so-called Mind-Body problem is one of the greatest and most quietly painful conundrums in philosophy – and more importantly, in every
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Rate Problem Involving Rational Equations

636 views / 0 likes - added 9 years ago

u15_l2_t1_we3 Rate Problem Involving Rational Equations
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The Square-Sum Problem - Numberphile

427 views / 0 likes - added 6 years ago

Matt Parker discusses a problem involving Square Sums. Go deeper with extra footage: https://youtu.be/7_ph5djCCnM More links & stuff in full description below ↓↓↓ More Matt Parker on Numberphile: http://bit.ly/Matt_Videos Matt's projects and other stuff:
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Right Triangle Word Problems — Harder Example | Math | New SAT | Khan Academy

702 views / 0 likes - added 8 years ago

Watch Sal work through a harder Right triangle word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s6-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
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Right Triangle Word Problems — Basic Example | Math | New SAT | Khan Academy

691 views / 0 likes - added 8 years ago

Watch Sal work through a basic Right triangle word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s2-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
05:09 Popular
Volume Word Problems — Harder Example | Math | New SAT | Khan Academy

1,202 views / 0 likes - added 8 years ago

Watch Sal work through a harder Volume word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s2-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previou
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The Problem Newton Got Wrong

373 views / 0 likes - added 2 years ago

Watch my newest video, "Could a Toothpaste Sandwich Brush Your Teeth?": https://youtu.be/OdeiWhETqQYGo to https://buyraycon.com/vsauce2 for 15% off your order!Brought to you by Raycon.Isaac Newton was right about everything from gravity to the calculus, b
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Clarence | Jeff's Word of the Day: Antidisestablishmentarianism | Cartoon Network | CN Mini

526 views / 0 likes - added 5 years ago

Take a lesson from Jeff and learn a new word to use in your everyday life! Today's word: Antidisestablishmentarianism. CN GAMES: http://bit.ly/CNGames SUBSCRIBE: http://bit.ly/109Y6wq WATCH MORE: http://bit.ly/1jq0JYj About Clarence: With his friends Sumo
08:29 Popular
The Uncracked Problem With 33 - Numberphile

704 views / 0 likes - added 8 years ago

33 is the lowest unsolved problem in the world of "summing three cubes". But 30 was also a tough nut to crack! Featuring Tim Browning from the University of Bristol. Taxi Cab Numbers: https://youtu.be/LzjaDKVC4iY Fermat's Last Theorem: https://youtu.be/qi
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Stoichiometry Example Problem 2

510 views / 0 likes - added 9 years ago

Stoichiometry Example Problem 2 More free lessons at: http://www.khanacademy.org/video?v=eQf_EAYGo-k
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Mountains of the Future: applying experimental plate tectonics to understand our geological past

163 views / 0 likes - added 2 years ago

You could call it experimental plate tectonics. Predicting the Mountains of the Future requires developing ‘rules’ and ‘recipes’ of geological behaviour. Geologists at Utrecht University's Faculty of Geosciences drew up a series of
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The Simplest Math Problem No One Can Solve

304 views / 0 likes - added 2 years ago

The Collatz Conjecture is the simplest math problem no one can solve it is easy enough for almost anyone to understand but notoriously difficult to solve. This video is sponsored by Brilliant. The first 200 people to sign up via https://brilliant.org/veri
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Neil deGrasse Tyson Explains The Three-Body Problem

25 views / 0 likes - added 1 week ago

What is the three body problem? Neil deGrasse Tyson and comedian Chuck Nice break down why the three body problem is unsolvable and what makes it mathematically chaotic. Is the solar system unstable? Find out about Isaac Newton’s worries about the s

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