18 加法 28 等于多少？
18 + 28 = 46
18加法28 等于 46
竖式演算
验算
- 用减法验算：46 − 28 = 18
- 用减法验算：46 − 18 = 28
相关题目
18 + 29 = 47
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19 + 28 = 47
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