21 减法 19 等于多少？
21 - 19 = 2
21减法19 等于 2
竖式演算
验算
- 用加法验算：2 + 19 = 21
相关题目
21 - 18 = 3
21 - 20 = 1
21 - 17 = 4
21 - 21 = 0
21 - 16 = 5
21 - 15 = 6
21 - 14 = 7
21 - 13 = 8
20 - 19 = 1
22 - 19 = 3
19 - 19 = 0
23 - 19 = 4
24 - 19 = 5
25 - 19 = 6
26 - 19 = 7
27 - 19 = 8
3 - 1 = 2
4 - 2 = 2
5 - 3 = 2
6 - 4 = 2
7 - 5 = 2
8 - 6 = 2
75 - 37 = 38
60 - 44 = 16
93 - 58 = 35
83 - 39 = 44
97 - 39 = 58
43 - 16 = 27
2 × 1 = 2
1 × 2 = 2