Question

Use the GCF and the distributive property to find the sum of 30 and 78

Answer 1

6(5 +13) = 108

Explanation:

The GCF can be found by considering the factoring of the two numbers:

30 = 2·3·5

78 = 2·3·13

The greatest common factor is 2·3 = 6. Then the sum is ...

30 +78 = 6(5 +13) = 6(18) = 108