Given the sum 30=12+18 , rewrite 12+18 using their GCF and multiplication.
To rewrite 12+18 using their greatest common factor (GCF) and multiplication, we first find the GCF of 12 and 18.
The factors of 12 are 1, 2, 3, 4, 6, and 12.
The factors of 18 are 1, 2, 3, 6, 9, and 18.
The common factors of 12 and 18 are 1, 2, 3, and 6.
The greatest common factor (GCF) of 12 and 18 is 6.
Now, we can rewrite 12+18 as the product of their GCF and the sum of the reduced fractions:
12 + 18 = (6 * 2) + (6 * 3)
= (6 * (2 + 3))
= 6 * 5
So, 12+18 can be rewritten as 6*5.