50 加法 70 等于多少？
50 + 70 = 120
50加法70 等于 120
竖式演算
验算
- 用减法验算：120 − 70 = 50
- 用减法验算：120 − 50 = 70
相关题目
50 + 69 = 119
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49 + 70 = 119
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21 + 99 = 120
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