69 加法 9 等于多少?
69 + 9 = 78
69加法9 等于 78
竖式演算
验算
- 用减法验算:78 − 9 = 69
- 用减法验算:78 − 69 = 9
相关题目
69 + 8 = 77
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69 + 6 = 75
69 + 13 = 82
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2 + 76 = 78
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85 - 7 = 78