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Simplify this problem 56x7+21x4+63x3 using the GCF.

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sparkle18 | eNoter

Posted July 10, 2013 at 3:02 PM via web

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Simplify this problem 56x7+21x4+63x3 using the GCF.

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durbanville | High School Teacher | (Level 1) Educator Emeritus

Posted July 10, 2013 at 3:19 PM (Answer #1)

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To simplify `56 times 7 + 21 times 4 + 63 times 3 ` find the GCF (greatest common factor) of `(56;21;63)` As this is 7 now factor out the 7:

`7(8 times 7 + 3 times 4 + 9 times 3)` noting that

7 x 8=56; 7 x 3=21 and 7 x 9 =63

Now simplify the contents of the bracket:

`7(56+12+27)`

`= 7(95)`

The question did not ask to solve but to check the answer:

7 x95=665 which is correct interm of the original question.

Ans: Simplified  56 x 7 + 21 x 4 + 63 x 3 = 7(95)

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