78 加法 2 等于多少？
78 + 2 = 80
78加法2 等于 80
竖式演算
验算
- 用减法验算：80 − 2 = 78
- 用减法验算：80 − 78 = 2
相关题目
78 + 1 = 79
78 + 3 = 81
78 + 4 = 82
78 + 5 = 83
78 + 6 = 84
78 + 7 = 85
78 + 8 = 86
78 + 9 = 87
77 + 2 = 79
79 + 2 = 81
76 + 2 = 78
80 + 2 = 82
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81 + 2 = 83
74 + 2 = 76
82 + 2 = 84
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2 + 78 = 80
3 + 77 = 80
4 + 76 = 80
5 + 75 = 80
6 + 74 = 80
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85 - 5 = 80