4 9 x 15 8 July 8, 2019 16 32 64 128 8 15 x 9 4 x 11 12 15 8 4 9 x 6 8 1 6 3 4 x 8 9 x 15 16 15 4 9 x 8 19 3 4 x 5 9 x 8 15 7 9 5 4 x 8 15 4 7 x 8 9 x 14 15 Tính 7 9 5 4 x 8 15 4 x - 9 = 15 9 x 4 x 15 9 x 8 =
