87 加法 52 等于多少？
87 + 52 = 139
87加法52 等于 139
竖式演算
验算
- 用减法验算：139 − 52 = 87
- 用减法验算：139 − 87 = 52
相关题目
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86 + 52 = 138
88 + 52 = 140
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