9x 9 5x 4 July 8, 2019 16 32 64 128 9x 9 5x 45 X 2 9x 9 =- 5x 4 9 5x 4 9x 17 48 9x (- 9 6x 5x 7 4x 9x 3.6 5x 4 )= 9 3x 2.6 4x 9x 9 1 5x 1 9x 9 12x 4x 13 5x
