21 加法 13 等于多少？
21 + 13 = 34
21加法13 等于 34
竖式演算
验算
- 用减法验算：34 − 13 = 21
- 用减法验算：34 − 21 = 13
相关题目
21 + 12 = 33
21 + 14 = 35
21 + 11 = 32
21 + 15 = 36
21 + 10 = 31
21 + 16 = 37
21 + 17 = 38
21 + 9 = 30
20 + 13 = 33
22 + 13 = 35
19 + 13 = 32
23 + 13 = 36
24 + 13 = 37
18 + 13 = 31
25 + 13 = 38
17 + 13 = 30
1 + 33 = 34
2 + 32 = 34
3 + 31 = 34
4 + 30 = 34
5 + 29 = 34
6 + 28 = 34
16 + 22 = 38
71 + 12 = 83
5 + 81 = 86
13 + 31 = 44
11 + 33 = 44
21 + 23 = 44
35 - 1 = 34
79 - 45 = 34