Question

Rewrite the sum of 24 and 40 by factoring out the greatest common factor.
12 + 18 = _ (_+_)

Answer 1

The greatest common factor would be 6.
12 18
/ \ / \
6 2 6 3
/ \ / \
2 3 2 3

You put the greatest common factor outside of the parentheses
6(_+_)
Then on each blank within the parentheses you fill in what you would multiply by 6 to get the original numbers (12 and 18)

So, 6 (2 + 3)