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
61 - 57 = 4
54 - 38 = 16
73 - 34 = 39
87 - 69 = 18
44 - 25 = 19
82 - 28 = 54
3 × 1 = 3
1 × 3 = 3