70 加法 39 等于多少？
70 + 39 = 109
70加法39 等于 109
竖式演算
验算
- 用减法验算：109 − 39 = 70
- 用减法验算：109 − 70 = 39
相关题目
70 + 38 = 108
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70 + 43 = 113
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47 + 47 = 94
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