31 加法 26 等于多少？
31 + 26 = 57
31加法26 等于 57
竖式演算
验算
- 用减法验算：57 − 26 = 31
- 用减法验算：57 − 31 = 26
相关题目
31 + 25 = 56
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30 + 26 = 56
32 + 26 = 58
29 + 26 = 55
33 + 26 = 59
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