Tính nhẩm:
8 : 2 = ..... 6 : 2 = .....
4 : 2 = ..... 2 : 2 = .....
12 : 2 = ..... 16 : 2 = .....
18 : 2 = ..... 10 : 2 = .....
20 : 2 = ..... 14 : 2 = .....
8 : 2 = 4 6 : 2 = 3
4 : 2 = 2 2 : 2 = 1
12 : 2 = 6 16 : 2 = 8
10 : 2 = 5 18 : 2 = 9
14 : 2 = 7 20 : 2 = 10
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