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
28 + 54 = 82
13 + 94 = 107
15 + 56 = 71
9 + 34 = 43
58 + 4 = 62
92 + 52 = 144
47 - 16 = 31
44 - 13 = 31