18 加法 51 等于多少？
18 + 51 = 69
18加法51 等于 69
竖式演算
验算
- 用减法验算：69 − 51 = 18
- 用减法验算：69 − 18 = 51
相关题目
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17 + 51 = 68
19 + 51 = 70
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2 + 67 = 69
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93 - 24 = 69