38 加法 2 等于多少?
38 + 2 = 40
38加法2 等于 40
竖式演算
验算
- 用减法验算:40 − 2 = 38
- 用减法验算:40 − 38 = 2
相关题目
38 + 1 = 39
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38 + 5 = 43
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39 + 2 = 41
40 + 2 = 42
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