20 加法 80 等于多少？
20 + 80 = 100
20加法80 等于 100
竖式演算
验算
- 用减法验算：100 − 80 = 20
- 用减法验算：100 − 20 = 80
相关题目
20 + 79 = 99
20 + 81 = 101
20 + 78 = 98
20 + 82 = 102
20 + 83 = 103
20 + 77 = 97
20 + 84 = 104
20 + 76 = 96
19 + 80 = 99
21 + 80 = 101
22 + 80 = 102
18 + 80 = 98
23 + 80 = 103
17 + 80 = 97
24 + 80 = 104
16 + 80 = 96
1 + 99 = 100
2 + 98 = 100
3 + 97 = 100
4 + 96 = 100
5 + 95 = 100
6 + 94 = 100
95 + 84 = 179
28 + 33 = 61
53 + 75 = 128
77 + 32 = 109
63 + 96 = 159
49 + 39 = 88
100 × 1 = 100
5 × 20 = 100