84 加法 7 等于多少？
84 + 7 = 91
84加法7 等于 91
竖式演算
验算
- 用减法验算：91 − 7 = 84
- 用减法验算：91 − 84 = 7
相关题目
84 + 6 = 90
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84 + 10 = 94
84 + 11 = 95
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85 + 7 = 92
82 + 7 = 89
86 + 7 = 93
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2 + 89 = 91
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43 + 71 = 114
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