21 减法 15 等于多少？
21 - 15 = 6
21减法15 等于 6
竖式演算
验算
- 用加法验算：6 + 15 = 21
相关题目
21 - 14 = 7
21 - 16 = 5
21 - 13 = 8
21 - 17 = 4
21 - 12 = 9
21 - 18 = 3
21 - 11 = 10
21 - 19 = 2
20 - 15 = 5
22 - 15 = 7
19 - 15 = 4
23 - 15 = 8
18 - 15 = 3
24 - 15 = 9
25 - 15 = 10
17 - 15 = 2
7 - 1 = 6
8 - 2 = 6
9 - 3 = 6
10 - 4 = 6
11 - 5 = 6
12 - 6 = 6
50 - 14 = 36
24 - 9 = 15
84 - 28 = 56
82 - 5 = 77
72 - 39 = 33
45 - 38 = 7
1 × 6 = 6
3 + 3 = 6