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?
1 answer:
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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