34 加法 21 等于多少？
34 + 21 = 55
34加法21 等于 55
竖式演算
验算
- 用减法验算：55 − 21 = 34
- 用减法验算：55 − 34 = 21
相关题目
34 + 20 = 54
34 + 22 = 56
34 + 19 = 53
34 + 23 = 57
34 + 24 = 58
34 + 18 = 52
34 + 25 = 59
34 + 17 = 51
33 + 21 = 54
35 + 21 = 56
32 + 21 = 53
36 + 21 = 57
31 + 21 = 52
37 + 21 = 58
38 + 21 = 59
30 + 21 = 51
1 + 54 = 55
2 + 53 = 55
3 + 52 = 55
4 + 51 = 55
5 + 50 = 55
6 + 49 = 55
43 + 46 = 89
30 + 6 = 36
31 + 63 = 94
75 + 12 = 87
35 + 42 = 77
42 + 1 = 43
58 - 3 = 55
67 - 12 = 55