7 3 x4 2 5x6 July 8, 2019 16 32 64 128 6 4 x 9 5 7 x 3 2 X 5 2 3 2x 4 x 7 x 6 Tính 3 4 x 5 2 x 7 6 5 x 7 = 35 7 x 6 x 5 x 4 x 3 x 2 x 1
