Tính nhẩm: 2 x 6

2 × 6 = 12

6 × 2 = 12

12 : 2 = 6

12 : 6 = 2

7 × 4 = 28

4 × 7 = 28

28 : 7 = 4

28 : 4 = 7

9 × 3 = 27

3 × 9 = 27

27 : 9 = 3

27 : 3 = 9

8 × 5 = 40

5 × 8 = 40

40 : 8 = 5

40 : 5 = 8