9 加法 47 等于多少？
9 + 47 = 56
9加法47 等于 56
竖式演算
验算
- 用减法验算：56 − 47 = 9
- 用减法验算：56 − 9 = 47
相关题目
9 + 46 = 55
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10 + 47 = 57
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2 + 54 = 56
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