31 加法 7 等于多少？
31 + 7 = 38
31加法7 等于 38
竖式演算
验算
- 用减法验算：38 − 7 = 31
- 用减法验算：38 − 31 = 7
相关题目
31 + 6 = 37
31 + 8 = 39
31 + 5 = 36
31 + 9 = 40
31 + 4 = 35
31 + 10 = 41
31 + 11 = 42
31 + 3 = 34
30 + 7 = 37
32 + 7 = 39
29 + 7 = 36
33 + 7 = 40
28 + 7 = 35
34 + 7 = 41
35 + 7 = 42
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1 + 37 = 38
2 + 36 = 38
3 + 35 = 38
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5 + 33 = 38
6 + 32 = 38
32 + 63 = 95
23 + 31 = 54
45 + 24 = 69
5 + 23 = 28
6 + 100 = 106
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72 - 34 = 38
48 - 10 = 38