21 加法 83 等于多少？
21 + 83 = 104
21加法83 等于 104
竖式演算
验算
- 用减法验算：104 − 83 = 21
- 用减法验算：104 − 21 = 83
相关题目
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20 + 83 = 103
22 + 83 = 105
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