20 加法 29 等于多少？
20 + 29 = 49
20加法29 等于 49
竖式演算
验算
- 用减法验算：49 − 29 = 20
- 用减法验算：49 − 20 = 29
相关题目
20 + 28 = 48
20 + 30 = 50
20 + 31 = 51
20 + 27 = 47
20 + 32 = 52
20 + 26 = 46
20 + 33 = 53
20 + 25 = 45
19 + 29 = 48
21 + 29 = 50
22 + 29 = 51
18 + 29 = 47
23 + 29 = 52
17 + 29 = 46
24 + 29 = 53
16 + 29 = 45
1 + 48 = 49
2 + 47 = 49
3 + 46 = 49
4 + 45 = 49
5 + 44 = 49
6 + 43 = 49
89 + 10 = 99
12 + 37 = 49
31 + 25 = 56
100 + 44 = 144
23 + 15 = 38
32 + 45 = 77
99 - 50 = 49
53 - 4 = 49