20 加法 39 等于多少？
20 + 39 = 59
20加法39 等于 59
竖式演算
验算
- 用减法验算：59 − 39 = 20
- 用减法验算：59 − 20 = 39
相关题目
20 + 38 = 58
20 + 40 = 60
20 + 37 = 57
20 + 41 = 61
20 + 42 = 62
20 + 36 = 56
20 + 43 = 63
20 + 35 = 55
19 + 39 = 58
21 + 39 = 60
22 + 39 = 61
18 + 39 = 57
23 + 39 = 62
17 + 39 = 56
24 + 39 = 63
16 + 39 = 55
1 + 58 = 59
2 + 57 = 59
3 + 56 = 59
4 + 55 = 59
5 + 54 = 59
6 + 53 = 59
40 + 8 = 48
23 + 21 = 44
13 + 61 = 74
60 + 18 = 78
53 + 22 = 75
16 + 63 = 79
84 - 25 = 59
77 - 18 = 59