13 加法 77 等于多少？
13 + 77 = 90
13加法77 等于 90
竖式演算
验算
- 用减法验算：90 − 77 = 13
- 用减法验算：90 − 13 = 77
相关题目
13 + 76 = 89
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14 + 77 = 91
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15 + 77 = 92
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2 + 88 = 90
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