70 加法 1 等于多少?
70 + 1 = 71
70加法1 等于 71
竖式演算
验算
- 用减法验算:71 − 1 = 70
- 用减法验算:71 − 70 = 1
相关题目
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70 + 7 = 77
70 + 8 = 78
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