5 6 b 1 7 8 July 8, 2019 16 32 64 128 A 1 2 3 4 5 b 6 7 8 9 6 5 b 2 1 = 8 7 Frac 5 6 b + frac 1 2 = frac 7 8 5 6 - 1 8 5 6-7 8