17 加法 9 等于多少？
17 + 9 = 26
17加法9 等于 26
竖式演算
验算
- 用减法验算：26 − 9 = 17
- 用减法验算：26 − 17 = 9
相关题目
17 + 8 = 25
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17 + 13 = 30
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2 + 24 = 26
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