84 加法 55 等于多少？
84 + 55 = 139
84加法55 等于 139
竖式演算
验算
- 用减法验算：139 − 55 = 84
- 用减法验算：139 − 84 = 55
相关题目
84 + 56 = 140
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84 + 59 = 143
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83 + 55 = 138
85 + 55 = 140
82 + 55 = 137
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