7 加法 28 等于多少？
7 + 28 = 35
7加法28 等于 35
竖式演算
验算
- 用减法验算：35 − 28 = 7
- 用减法验算：35 − 7 = 28
相关题目
7 + 29 = 36
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7 + 32 = 39
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