84 加法 54 等于多少？
84 + 54 = 138
84加法54 等于 138
竖式演算
验算
- 用减法验算：138 − 54 = 84
- 用减法验算：138 − 84 = 54
相关题目
84 + 53 = 137
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85 + 54 = 139
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