39 加法 20 等于多少？
39 + 20 = 59
39加法20 等于 59
竖式演算
验算
- 用减法验算：59 − 20 = 39
- 用减法验算：59 − 39 = 20
相关题目
39 + 19 = 58
39 + 21 = 60
39 + 22 = 61
39 + 18 = 57
39 + 23 = 62
39 + 17 = 56
39 + 24 = 63
39 + 16 = 55
38 + 20 = 58
40 + 20 = 60
37 + 20 = 57
41 + 20 = 61
42 + 20 = 62
36 + 20 = 56
43 + 20 = 63
35 + 20 = 55
1 + 58 = 59
2 + 57 = 59
3 + 56 = 59
4 + 55 = 59
5 + 54 = 59
6 + 53 = 59
10 + 48 = 58
44 + 34 = 78
15 + 10 = 25
41 + 22 = 63
58 + 11 = 69
13 + 51 = 64
71 - 12 = 59
67 - 8 = 59