18 加法 59 等于多少？
18 + 59 = 77
18加法59 等于 77
竖式演算
验算
- 用减法验算：77 − 59 = 18
- 用减法验算：77 − 18 = 59
相关题目
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19 + 59 = 78
20 + 59 = 79
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2 + 75 = 77
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