78 加法 39 等于多少？
78 + 39 = 117
78加法39 等于 117
竖式演算
验算
- 用减法验算：117 − 39 = 78
- 用减法验算：117 − 78 = 39
相关题目
78 + 38 = 116
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77 + 39 = 116
79 + 39 = 118
76 + 39 = 115
80 + 39 = 119
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9 × 13 = 117
13 × 9 = 117