2 7-(5 9-1 2)= July 8, 2019 16 32 64 128 2 7 5 9 1 2 2 7 9 x 2 1 5 2 7 9 x 2 1 5 as a fraction 1 2a 5 7 9 2 a 5 1 2x 5 7 9 2 x 5 2x 1 2 3x 7 9 5 18
