Using the distributive property, rewrite 12 + 15 by factoring out the GCF

__Determine the factors for 12 up to 12 since that is the minimum of the 2 numbers__1,2,3,4,6,12

__Determine the factors for 15 up to 12 since that is the minimum of the 2 numbers__1,3,5

The common factors between them are 1,3

The greatest common factor between them is

**3**__Factor out the GCF from 12____Factor out the GCF from 15____Rewrite the sum using the distributive property by factoring out the GCF of 3:__3(4 + 5)

To see the LCM of these numbers, click the LCM button above