Given the sum 99=33+66, rewrite 33+66 using their GCF and multiplication.

To rewrite 33+66 using their greatest common factor (GCF) and multiplication, we need to find the GCF of 33 and 66 first.

The prime factorization of 33 is 3*11.
The prime factorization of 66 is 2*3*11.

The GCF of 33 and 66 is the product of the common prime factors raised to the lowest exponent, which is 3*11.

Now, we can rewrite 33+66 using their GCF and multiplication:
33 + 66 = (3*11) + (2*3*11)
= 3*11 + 2*3*11
= (3+2)*3*11
= 5*3*11

Therefore, 33+66 can be rewritten as 5*3*11.

To rewrite 33 + 66 using their greatest common factor (GCF) and multiplication, we need to find the GCF of 33 and 66.

The factors of 33 are 1, 3, 11, and 33.
The factors of 66 are 1, 2, 3, 6, 11, 22, 33, and 66.

The largest number that appears in both lists is 33, which means the GCF of 33 and 66 is 33.

Now, we can rewrite 33 + 66 as (33 * 1) + (33 * 2), which can be simplified as 33(1 + 2).

Therefore, 33 + 66 can be rewritten as 33(3).