7 加法 50 等于多少？
7 + 50 = 57
7加法50 等于 57
竖式演算
验算
- 用减法验算：57 − 50 = 7
- 用减法验算：57 − 7 = 50
相关题目
7 + 49 = 56
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7 + 53 = 60
7 + 46 = 53
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8 + 50 = 58
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9 + 50 = 59
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2 + 55 = 57
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