Câu hỏi :

Tính nhẩm:

9 + 5                      13 – 4                              8 + 2                      10 – 3

19 + 5                    23 – 4                              38 + 2                    50 – 3

29 + 5                    83 – 4                              98 + 2                    100 – 3

* Đáp án

* Hướng dẫn giải

9 + 5 = 14

19 + 5 = 24

29 + 5 = 34

13 – 4 = 9

23 – 4 = 19

83 – 4 = 79

8 + 2 = 10

38 + 2 = 40

98 + 2 = 100

10 – 3 = 7

50 – 3 = 47

100 – 3 = 97

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