45 加法 7 等于多少？
45 + 7 = 52
45加法7 等于 52
竖式演算
验算
- 用减法验算：52 − 7 = 45
- 用减法验算：52 − 45 = 7
相关题目
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44 + 7 = 51
46 + 7 = 53
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