21 加法 6 等于多少？
21 + 6 = 27
21加法6 等于 27
竖式演算
验算
- 用减法验算：27 − 6 = 21
- 用减法验算：27 − 21 = 6
相关题目
21 + 5 = 26
21 + 7 = 28
21 + 4 = 25
21 + 8 = 29
21 + 3 = 24
21 + 9 = 30
21 + 2 = 23
21 + 10 = 31
20 + 6 = 26
22 + 6 = 28
19 + 6 = 25
23 + 6 = 29
24 + 6 = 30
18 + 6 = 24
25 + 6 = 31
17 + 6 = 23
1 + 26 = 27
2 + 25 = 27
3 + 24 = 27
4 + 23 = 27
5 + 22 = 27
6 + 21 = 27
94 + 5 = 99
2 + 14 = 16
2 + 40 = 42
37 + 12 = 49
17 + 80 = 97
92 + 3 = 95
28 - 1 = 27
76 - 49 = 27