80 加法 20 等于多少？
80 + 20 = 100
80加法20 等于 100
竖式演算
验算
- 用减法验算：100 − 20 = 80
- 用减法验算：100 − 80 = 20
相关题目
80 + 19 = 99
80 + 21 = 101
80 + 22 = 102
80 + 18 = 98
80 + 23 = 103
80 + 17 = 97
80 + 24 = 104
80 + 16 = 96
79 + 20 = 99
81 + 20 = 101
78 + 20 = 98
82 + 20 = 102
83 + 20 = 103
77 + 20 = 97
84 + 20 = 104
76 + 20 = 96
1 + 99 = 100
2 + 98 = 100
3 + 97 = 100
4 + 96 = 100
5 + 95 = 100
6 + 94 = 100
6 + 78 = 84
48 + 33 = 81
9 + 84 = 93
67 + 25 = 92
81 + 33 = 114
62 + 51 = 113
25 × 4 = 100
20 × 5 = 100