Given the sum 100 = 64 + 36, rewrite 64 + 36 using their GCF and multiplication.
A: 1 (64 + 36)
B: 4 (16 * 9)
C: 2 (32 + 18)
D: 4 (16 + 9)
The GCF of 64 and 36 is 4.
So, rewriting 64 + 36 using their GCF and multiplication would be 4 * (16 + 9).
Therefore, the correct answer is option D: 4 (16 + 9).