2 加法 78 等于多少？
2 + 78 = 80
2加法78 等于 80
竖式演算
验算
- 用减法验算：80 − 78 = 2
- 用减法验算：80 − 2 = 78
相关题目
2 + 77 = 79
2 + 79 = 81
2 + 76 = 78
2 + 80 = 82
2 + 75 = 77
2 + 81 = 83
2 + 74 = 76
2 + 82 = 84
1 + 78 = 79
3 + 78 = 81
4 + 78 = 82
5 + 78 = 83
6 + 78 = 84
7 + 78 = 85
8 + 78 = 86
9 + 78 = 87
1 + 79 = 80
3 + 77 = 80
4 + 76 = 80
5 + 75 = 80
6 + 74 = 80
7 + 73 = 80
81 + 81 = 162
68 + 41 = 109
39 + 22 = 61
48 + 90 = 138
92 + 82 = 174
37 + 19 = 56
84 - 4 = 80
87 - 7 = 80