45 加法 9 等于多少?
45 + 9 = 54
45加法9 等于 54
竖式演算
验算
- 用减法验算:54 − 9 = 45
- 用减法验算:54 − 45 = 9
相关题目
45 + 8 = 53
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44 + 9 = 53
46 + 9 = 55
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