72 加法 1 等于多少？
72 + 1 = 73
72加法1 等于 73
竖式演算
验算
- 用减法验算：73 − 1 = 72
- 用减法验算：73 − 72 = 1
相关题目
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72 + 3 = 75
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72 + 6 = 78
72 + 7 = 79
72 + 8 = 80
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99 - 26 = 73