50 加法 7 等于多少？
50 + 7 = 57
50加法7 等于 57
竖式演算
验算
- 用减法验算：57 − 7 = 50
- 用减法验算：57 − 50 = 7
相关题目
50 + 6 = 56
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50 + 11 = 61
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48 + 7 = 55
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2 + 55 = 57
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75 - 18 = 57