5 x 2 3 72 July 8, 2019 16 32 64 128 720 x 5 )= 2 3 X 5 9x 3 8x 2 72 X 5 9x 3 8x 2 72 0 720 ax 3 ax 5 2 x 3 72 x 3 4 5 x 2 3 2 5 729 x 720 chia x nhân 5 2 x 3 5 90 x 2 72 2 1 3 5 x 7 = 35 2 x 2 5 5 x2
