1 3 4 x 2 3 (- 12 4 July 8, 2019 16 32 64 128 1 3 4 x 2 3 (- 12 divided by 4 X 2 4 4 3 4x 1 12 2 3 1 2 + 3 4 4 1/2 + 1 1/3 1 + 2 + 3 + 4 = 10 1 - 2 = 4