GCF Rewrite Sum of 12 and 15

Number 1Number 2(Optional) Enter Number 3

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
4 =12
3

Factor out the GCF from 15
5 =15
3

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