49 加法 71 等于多少？
49 + 71 = 120
49加法71 等于 120
竖式演算
验算
- 用减法验算：120 − 71 = 49
- 用减法验算：120 − 49 = 71
相关题目
49 + 70 = 119
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50 + 71 = 121
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2 × 60 = 120