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
31 + 5 = 36
73 + 4 = 77
44 + 41 = 85
10 + 38 = 48
72 + 14 = 86
31 + 23 = 54
96 - 37 = 59
89 - 30 = 59