0 8 x 9 6 1 6 x 0 2 July 8, 2019 16 32 64 128 Tính nhanh 0 8 x 9 6 1 6 x 2 0 6 x 8 9 6 (-0 8) 0 6 x 0 9 0 8 x 9 0 6 x 9
