7 加法 78 等于多少？
7 + 78 = 85
7加法78 等于 85
竖式演算
验算
- 用减法验算：85 − 78 = 7
- 用减法验算：85 − 7 = 78
相关题目
7 + 77 = 84
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7 + 81 = 88
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6 + 78 = 84
8 + 78 = 86
5 + 78 = 83
9 + 78 = 87
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2 + 83 = 85
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