70 加法 9 等于多少？
70 + 9 = 79
70加法9 等于 79
竖式演算
验算
- 用减法验算：79 − 9 = 70
- 用减法验算：79 − 70 = 9
相关题目
70 + 8 = 78
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70 + 13 = 83
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2 + 77 = 79
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33 + 26 = 59
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90 - 11 = 79