87 加法 39 等于多少？
87 + 39 = 126
87加法39 等于 126
竖式演算
验算
- 用减法验算：126 − 39 = 87
- 用减法验算：126 − 87 = 39
相关题目
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86 + 39 = 125
88 + 39 = 127
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