5 加法 40 等于多少?
5 + 40 = 45
5加法40 等于 45
竖式演算
验算
- 用减法验算:45 − 40 = 5
- 用减法验算:45 − 5 = 40
相关题目
5 + 39 = 44
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7 + 40 = 47
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