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 + 58 = 142
84 + 52 = 136
84 + 59 = 143
84 + 51 = 135
83 + 55 = 138
85 + 55 = 140
82 + 55 = 137
86 + 55 = 141
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40 + 99 = 139
41 + 98 = 139
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4 + 27 = 31
66 + 9 = 75
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