20 加法 15 等于多少？
20 + 15 = 35
20加法15 等于 35
竖式演算
验算
- 用减法验算：35 − 15 = 20
- 用减法验算：35 − 20 = 15
相关题目
20 + 14 = 34
20 + 16 = 36
20 + 13 = 33
20 + 17 = 37
20 + 12 = 32
20 + 18 = 38
20 + 11 = 31
20 + 19 = 39
19 + 15 = 34
21 + 15 = 36
22 + 15 = 37
18 + 15 = 33
23 + 15 = 38
17 + 15 = 32
24 + 15 = 39
16 + 15 = 31
1 + 34 = 35
2 + 33 = 35
3 + 32 = 35
4 + 31 = 35
5 + 30 = 35
6 + 29 = 35
1 + 26 = 27
100 + 80 = 180
20 + 9 = 29
82 + 17 = 99
50 + 48 = 98
100 + 17 = 117
96 - 61 = 35
90 - 55 = 35