12 8 9 x 4 July 8, 2019 16 32 64 128 9 x 8 3 4x 12 12 3 8 x 9 1 4 12 x 9 8 16 x 4 12 4 2x 9 )=- 8 x 3 8 x 9 )= 6 2x 12 )- 4x 12 3 x 4 9 8 2 12 1 8 x 9 1 4 x 4 5 12 3 8 x 4 9 5 12 3 8 x 4 9 bằng bao nhiêu 12 x 8/9 9 x 8 =