crisleigh crisleigh

25-01-2017
Mathematics

contestada

Sue wants to use mental math to solve 7 times 53. What is an expression that she can use?

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ethanmitchell44 ethanmitchell44

25-01-2017

multiplication.......................

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sfaigan sfaigan

25-01-2017

53 = (10 x 5) + 3

7 x 53 = (7 x 5 x 10) + (7 x 3)

7 x 5 x 10 = 35 x 10 = 350
7 x 3 = 21

350 + 21 = 371

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