9 加法 70 等于多少？
9 + 70 = 79
9加法70 等于 79
竖式演算
验算
- 用减法验算：79 − 70 = 9
- 用减法验算：79 − 9 = 70
相关题目
9 + 69 = 78
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10 + 70 = 80
11 + 70 = 81
7 + 70 = 77
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2 + 77 = 79
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23 + 1 = 24
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