28 加法 77 等于多少?
28 + 77 = 105
28加法77 等于 105
竖式演算
验算
- 用减法验算:105 − 77 = 28
- 用减法验算:105 − 28 = 77
相关题目
28 + 76 = 104
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29 + 77 = 106
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26 + 77 = 103
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