80 加法 1 等于多少？
80 + 1 = 81
80加法1 等于 81
竖式演算
验算
- 用减法验算：81 − 1 = 80
- 用减法验算：81 − 80 = 1
相关题目
80 + 2 = 82
80 + 3 = 83
80 + 4 = 84
80 + 5 = 85
80 + 6 = 86
80 + 7 = 87
80 + 8 = 88
80 + 9 = 89
79 + 1 = 80
81 + 1 = 82
78 + 1 = 79
82 + 1 = 83
83 + 1 = 84
77 + 1 = 78
84 + 1 = 85
76 + 1 = 77
1 + 80 = 81
2 + 79 = 81
3 + 78 = 81
4 + 77 = 81
5 + 76 = 81
6 + 75 = 81
11 + 78 = 89
83 + 11 = 94
3 + 72 = 75
18 + 50 = 68
25 + 74 = 99
33 + 60 = 93
97 - 16 = 81
83 - 2 = 81