11 加法 42 等于多少？
11 + 42 = 53
11加法42 等于 53
竖式演算
验算
- 用减法验算：53 − 42 = 11
- 用减法验算：53 − 11 = 42
相关题目
11 + 41 = 52
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12 + 42 = 54
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