4 1 4 15 5 July 8, 2019 16 32 64 128 1 4 15 50 1 4 15 56 1 15 4 4 5 х 2 21 1 4 15 add 2 4 5 4 5x 4 15 2 3x 1 1 4 15 add 2 4 5 as a fraction 1 4 15 add 2 4 5 as a mixed number 1 4 15 plus 2 4 5 4 1 15 x 2 4 5