73 加法 31 等于多少？
73 + 31 = 104
73加法31 等于 104
竖式演算
验算
- 用减法验算：104 − 31 = 73
- 用减法验算：104 − 73 = 31
相关题目
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92 + 50 = 142
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13 × 8 = 104