4 5 10 2 July 8, 2019 16 32 64 128 4 5 10 20 4 5 10 23 4 5 10 2 6 4 5 10 24 4 5 10 25 4 5 10 2r 3s 4 5 2 10 8 4 5 2 10 as a fraction 4 5 20x 10 4 5 2x 10 4 5 (- 2a 10 4 5 x 10 2 4 5 x 10 )= 20 4 5 10 1 2 4 5 7 10 2