#1**+2 **

The greatest common factor (GCF) is 4

There are two methods to approach this problem.

1. Listing

You list all the factors of 8 and all the factors of 12 and then you find the greatest common factpr.

8) 1 , 2 , ** 4** , 8

12) 1 , 2 , 3 , ** 4** , 6 , 12

2. Prime factorization

First you factorize both numbers...

8) 2 * 2 * 2

12) 2 * 2 * 3

You take numbers that occur in both lists, which is 2 2's and you multiply them together. 2 * 2 is four. The answer is same both ways. The first method is easier in this case, but with bigger numbers, the second method will be eaiser.

supermanaccz
Oct 8, 2017