24 加法 56 等于多少？
24 + 56 = 80
24加法56 等于 80
竖式演算
验算
- 用减法验算：80 − 56 = 24
- 用减法验算：80 − 24 = 56
相关题目
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23 + 56 = 79
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22 + 56 = 78
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