6 7 1 2 x 3 4 5 8 July 8, 2019 16 32 64 128 1 9 1 7 1 5 x 2 3 4 6 8 1 1 2 x 4 3 5 6 divided by 7 8 6 7 ( 1 2x3 4 )- 5 8 Tính 1 x 2 x 3 x 4 5 x 6 x 7 x 8 6 5 - 7 4 + 1