29 加法 21 等于多少？
29 + 21 = 50
29加法21 等于 50
竖式演算
验算
- 用减法验算：50 − 21 = 29
- 用减法验算：50 − 29 = 21
相关题目
29 + 20 = 49
29 + 22 = 51
29 + 19 = 48
29 + 23 = 52
29 + 24 = 53
29 + 18 = 47
29 + 25 = 54
29 + 17 = 46
28 + 21 = 49
30 + 21 = 51
31 + 21 = 52
27 + 21 = 48
32 + 21 = 53
26 + 21 = 47
33 + 21 = 54
25 + 21 = 46
1 + 49 = 50
2 + 48 = 50
3 + 47 = 50
4 + 46 = 50
5 + 45 = 50
6 + 44 = 50
8 + 37 = 45
31 + 81 = 112
89 + 4 = 93
11 + 93 = 104
55 + 60 = 115
95 + 84 = 179
94 - 44 = 50
74 - 24 = 50