13 加法 78 等于多少？
13 + 78 = 91
13加法78 等于 91
竖式演算
验算
- 用减法验算：91 − 78 = 13
- 用减法验算：91 − 13 = 78
相关题目
13 + 77 = 90
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12 + 78 = 90
14 + 78 = 92
11 + 78 = 89
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2 + 89 = 91
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93 - 2 = 91