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 need to find the GCF of 25 and 45.
The factors of 25 are: 1, 5, 25.
The factors of 45 are: 1, 3, 5, 9, 15, 45.
The common factors of 25 and 45 are 1 and 5. The greatest common factor is 5.
Now, we can rewrite 25 + 45 as the product of the GCF (5) and the sum of the reduced fractions:
25 = 5 * 5
45 = 5 * 9
Using this, we have:
25 + 45 = (5 * 5) + (5 * 9).
Simplifying this further:
25 + 45 = 5(5 + 9).
Therefore, using the GCF and multiplication, we can rewrite 25 + 45 as 5(5 + 9).