2 5 x 4 7 3 7 July 8, 2019 16 32 64 128 2 5 x 3 7 2 5 x 4 7 1 10 Tính nhanh 2 5 x 7 4 2 5 x 3 7 5 x 7 )- 3 x 4 )= 7x 2 Find 2 5 x 3 7 1 4 3 7x3 5 3 5x 2 )/ 4 2 7x 3 5 x 7 2 x 7 5 x 9 x 3 4 x 7 6 5 x 7 = 35 5 7×4 2
