52 加法 87 等于多少？
52 + 87 = 139
52加法87 等于 139
竖式演算
验算
- 用减法验算：139 − 87 = 52
- 用减法验算：139 − 52 = 87
相关题目
52 + 86 = 138
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53 + 87 = 140
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