what is 19x11?

+2 votes
828 views
asked Aug 19, 2015 in Math by Isabela


3 Answers

0 votes
Multiplication by 11 is simple. For a 2-digit number just add the two digits of the number multiplied by 11 and place the sum in between that number carrying any ones overs.
 
 
19 x 11 
 
1 + 9 = 10  (you will carry the 1 )
take the first number (19) and spread out the 1 and 9
1 ____  9
put the sum in the middle using only the last digit. Carry the ones, if any over.
 1     9
 1 0
-----------
 2 0 9
Answer: 209
 
Easy. No calculator needed!
 
answered Aug 19, 2015 by whizkid (56,380 points)
wrong. the correct answer is 361. looks like there WAS a calculator needed. check the calculator next time, or at the least, learn how to add and multiply.

"whizkid"...okay... >_<

I did use a calculator (windows 10) and I got the same answer as whizkid. I think you're wrong Reagan.

p.s flagging is reporting something innapropiate not incorrect.

It is 209.
0 votes
190 plus 19

=209
answered May 15, 2016 by arKZo (186,150 points)
0 votes

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answered May 16, 2016 by kidzsearch (66,620 points)
Wow! Now I won't have to type in google anymore!!

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