21 减法 7 等于多少？
21 - 7 = 14
21减法7 等于 14
竖式演算
验算
- 用加法验算：14 + 7 = 21
相关题目
21 - 6 = 15
21 - 8 = 13
21 - 5 = 16
21 - 9 = 12
21 - 4 = 17
21 - 10 = 11
21 - 3 = 18
21 - 11 = 10
20 - 7 = 13
22 - 7 = 15
19 - 7 = 12
23 - 7 = 16
18 - 7 = 11
24 - 7 = 17
17 - 7 = 10
25 - 7 = 18
15 - 1 = 14
16 - 2 = 14
17 - 3 = 14
18 - 4 = 14
19 - 5 = 14
20 - 6 = 14
97 - 49 = 48
80 - 8 = 72
82 - 65 = 17
62 - 5 = 57
70 - 27 = 43
64 - 26 = 38
13 + 1 = 14
7 + 7 = 14