3 加法 42 等于多少？
3 + 42 = 45
3加法42 等于 45
竖式演算
验算
- 用减法验算：45 − 42 = 3
- 用减法验算：45 − 3 = 42
相关题目
3 + 41 = 44
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3 + 45 = 48
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4 + 42 = 46
1 + 42 = 43
5 + 42 = 47
6 + 42 = 48
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2 + 43 = 45
4 + 41 = 45
5 + 40 = 45
6 + 39 = 45
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