Problem 299

Problem 299

The product 12 x 16 can be found by thinking, (10 +2) x 6 = (10 x 6 ) + (2 x 6) = 60 + 12 = 72.

a. What properties of multiplication are being used?

b. Use these properties to verify the product 12 x 64.

 

Solution

 

a.      the distributive property of multiplication over addition and closure property.

b.      12 x 64 = (10 + 2) x 64 = 10 x 64 + 2 x 64 = 640 + 128 = 768

 

 

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