20 减法 9 等于多少？
20 - 9 = 11
20减法9 等于 11
竖式演算
验算
- 用加法验算：11 + 9 = 20
相关题目
20 - 8 = 12
20 - 10 = 10
20 - 7 = 13
20 - 11 = 9
20 - 6 = 14
20 - 12 = 8
20 - 5 = 15
20 - 13 = 7
19 - 9 = 10
21 - 9 = 12
18 - 9 = 9
22 - 9 = 13
23 - 9 = 14
17 - 9 = 8
24 - 9 = 15
16 - 9 = 7
12 - 1 = 11
13 - 2 = 11
14 - 3 = 11
15 - 4 = 11
16 - 5 = 11
17 - 6 = 11
21 - 5 = 16
80 - 18 = 62
71 - 19 = 52
86 - 17 = 69
74 - 66 = 8
94 - 19 = 75
6 + 5 = 11
7 + 4 = 11