31 加法 42 等于多少？
31 + 42 = 73
31加法42 等于 73
竖式演算
验算
- 用减法验算：73 − 42 = 31
- 用减法验算：73 − 31 = 42
相关题目
31 + 41 = 72
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31 + 44 = 75
31 + 39 = 70
31 + 45 = 76
31 + 38 = 69
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30 + 42 = 72
32 + 42 = 74
29 + 42 = 71
33 + 42 = 75
28 + 42 = 70
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2 + 71 = 73
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36 + 22 = 58
23 + 2 = 25
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