71 加法 51 等于多少？
71 + 51 = 122
71加法51 等于 122
竖式演算
验算
- 用减法验算：122 − 51 = 71
- 用减法验算：122 − 71 = 51
相关题目
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70 + 51 = 121
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2 × 61 = 122