90 加法 50 等于多少？
90 + 50 = 140
90加法50 等于 140
竖式演算
验算
- 用减法验算：140 − 50 = 90
- 用减法验算：140 − 90 = 50
相关题目
90 + 49 = 139
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10 × 14 = 140