70 加法 69 等于多少？
70 + 69 = 139
70加法69 等于 139
竖式演算
验算
- 用减法验算：139 − 69 = 70
- 用减法验算：139 − 70 = 69
相关题目
70 + 68 = 138
70 + 70 = 140
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69 + 69 = 138
71 + 69 = 140
68 + 69 = 137
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