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
==========================
You can shorten that by saying
10(13) + 2(13)
= 130 + 26
= 156
    
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
==========================
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
    
http://www.khanacademy.org/math/arithmetic-home/multiply-divide/multi-digit-mult/v/multiplying-whole-numbers-and-applications-2
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