4 1 2x 7 )= 12 July 8, 2019 16 32 64 128 4 1 2x )- 7 3x 12 1 2x 7 1 4 x 12 10x 6x 4 1 7 12 2x 2x X 5 6 14 x 2 1 4 2x 7 12 4 + 4 = 12 4 1/2 + 1 1/3 1 - 2 = 4