katebug63 katebug63

27-08-2016
Mathematics

contestada

Xiao's teacher asked him to rewrite the sum 60+ 90 as the product of the GFC of the two numbers and a sum. Xiao wrote 3(20+30). What mistake did Xiao make? How should he have written the sum?

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FrostedHope12 FrostedHope12

27-08-2016

the greatest common factor here is not 3, it's 30.
so it should be 30(2+3)

hopefully this helps!

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