X 0 25 x 2 5 1 8 July 8, 2019 16 32 64 128 4 x 0 8 x 2 5 x 1 25 1 25 x 2 5 x 36 x 0 4 x 80 Tính nhanh 0 8 x 2 5 x 1 25 X 0 25 x chia 2 5 1 8 0 25 / x = 0 5 / 8 4
