21 加法 34 等于多少？
21 + 34 = 55
21加法34 等于 55
竖式演算
验算
- 用减法验算：55 − 34 = 21
- 用减法验算：55 − 21 = 34
相关题目
21 + 33 = 54
21 + 35 = 56
21 + 32 = 53
21 + 36 = 57
21 + 31 = 52
21 + 37 = 58
21 + 38 = 59
21 + 30 = 51
20 + 34 = 54
22 + 34 = 56
19 + 34 = 53
23 + 34 = 57
24 + 34 = 58
18 + 34 = 52
25 + 34 = 59
17 + 34 = 51
1 + 54 = 55
2 + 53 = 55
3 + 52 = 55
4 + 51 = 55
5 + 50 = 55
6 + 49 = 55
41 + 37 = 78
22 + 64 = 86
11 + 58 = 69
6 + 62 = 68
45 + 51 = 96
52 + 1 = 53
70 - 15 = 55
66 - 11 = 55