15 加法 20 等于多少？
15 + 20 = 35
15加法20 等于 35
竖式演算
验算
- 用减法验算：35 − 20 = 15
- 用减法验算：35 − 15 = 20
相关题目
15 + 19 = 34
15 + 21 = 36
15 + 22 = 37
15 + 18 = 33
15 + 23 = 38
15 + 17 = 32
15 + 24 = 39
15 + 16 = 31
14 + 20 = 34
16 + 20 = 36
13 + 20 = 33
17 + 20 = 37
12 + 20 = 32
18 + 20 = 38
11 + 20 = 31
19 + 20 = 39
1 + 34 = 35
2 + 33 = 35
3 + 32 = 35
4 + 31 = 35
5 + 30 = 35
6 + 29 = 35
30 + 32 = 62
14 + 25 = 39
67 + 30 = 97
61 + 22 = 83
44 + 35 = 79
82 - 47 = 35
75 - 40 = 35
62 - 27 = 35