Question

PLs help ASAP as soon as possible and answer as if u=you were a fifth grader and i will mar as brainliest

Sandra used partial products to find the product of
438
×
17
by multiplying 438 by 1 and 438 by 7 to get 3,066. Find the product of
438
×
17
by using partial products. Is Sandra correct? Compare your answer to Sandra's and explain why it is or is not the same.

Answer 1

Let us determine the product of 438 and 17 by partial products.

Consider 438= 400+30+8

and 17 = 10+7

So, 438*17=(400+30+8)*(10+7)

438*17= (400*10)+(30*10)+(8*10)+(400*7)+(30*7)+(8*7)

438*17= 4000+300+80+2800+210+56

= 7446

Therefore, the product of 438 and 17 is 7446.No, Sandra's answer is not correct. Because she should have expressed 17 as (10+7), then if she multiplied (438 by 10) and (438 by 7). And, then added the results.

Then her answer would be correct.

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