21 减法 18 等于多少？
21 - 18 = 3
21减法18 等于 3
竖式演算
验算
- 用加法验算：3 + 18 = 21
相关题目
21 - 17 = 4
21 - 19 = 2
21 - 16 = 5
21 - 20 = 1
21 - 15 = 6
21 - 21 = 0
21 - 14 = 7
21 - 13 = 8
20 - 18 = 2
22 - 18 = 4
19 - 18 = 1
23 - 18 = 5
18 - 18 = 0
24 - 18 = 6
25 - 18 = 7
26 - 18 = 8
4 - 1 = 3
5 - 2 = 3
6 - 3 = 3
7 - 4 = 3
8 - 5 = 3
9 - 6 = 3
80 - 12 = 68
34 - 18 = 16
90 - 62 = 28
12 - 7 = 5
46 - 7 = 39
31 - 16 = 15
3 × 1 = 3
2 + 1 = 3