18 加法 13 等于多少？
18 + 13 = 31
18加法13 等于 31
竖式演算
验算
- 用减法验算：31 − 13 = 18
- 用减法验算：31 − 18 = 13
相关题目
18 + 12 = 30
18 + 14 = 32
18 + 11 = 29
18 + 15 = 33
18 + 10 = 28
18 + 16 = 34
18 + 17 = 35
18 + 9 = 27
17 + 13 = 30
19 + 13 = 32
20 + 13 = 33
16 + 13 = 29
21 + 13 = 34
15 + 13 = 28
22 + 13 = 35
14 + 13 = 27
1 + 30 = 31
2 + 29 = 31
3 + 28 = 31
4 + 27 = 31
5 + 26 = 31
6 + 25 = 31
13 + 57 = 70
7 + 27 = 34
82 + 36 = 118
9 + 56 = 65
46 + 63 = 109
60 + 49 = 109
1 × 31 = 31
100 - 69 = 31