Asked by Anonymous

How do you multiply 12 times 13 step by step step

Answers

Answered by Damon
There are lots of different ways.
perhaps the easiest to understand uses the distributive property
12 = 10 + 2
13 = 10 + 3

(10 + 2) (10 + 3)

= 10 (10+3) + 2 (10+3)

= 100 + 30 + 20 + 6

= 100 + 50 + 6

= 156
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You can shorten that by saying
10(13) + 2(13)
= 130 + 26
= 156

Answered by Writeacher
Another way (watch the video, then try it with your numbers):
http://www.khanacademy.org/math/arithmetic-home/multiply-divide/multi-digit-mult/v/multiplying-whole-numbers-and-applications-2

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