0 2 4 8 20 x July 8, 2019 16 32 64 128 2 8 20 x 1 1 4 0 5 2 8 ( 20 x1 1 4 0 5 2 4 x 0 8 2 - 2 = 0 2 8÷0 4= 2×0 8