given the sum 70 = 25 + 45 rewrite 25 + 45 using their GCF and multiplication

To rewrite 25 + 45 using their greatest common factor (GCF) and multiplication, we must first find the GCF of 25 and 45, which is 5.

So, 25 can be expressed as 5 * 5, and 45 can be expressed as 5 * 9.

Therefore, we can rewrite 25 + 45 as:

5 * 5 + 5 * 9.