12 加法 18 等于多少？
12 + 18 = 30
12加法18 等于 30
竖式演算
验算
- 用减法验算：30 − 18 = 12
- 用减法验算：30 − 12 = 18
相关题目
12 + 17 = 29
12 + 19 = 31
12 + 20 = 32
12 + 16 = 28
12 + 21 = 33
12 + 15 = 27
12 + 22 = 34
12 + 14 = 26
11 + 18 = 29
13 + 18 = 31
10 + 18 = 28
14 + 18 = 32
15 + 18 = 33
9 + 18 = 27
16 + 18 = 34
8 + 18 = 26
1 + 29 = 30
2 + 28 = 30
3 + 27 = 30
4 + 26 = 30
5 + 25 = 30
6 + 24 = 30
74 + 30 = 104
65 + 81 = 146
66 + 27 = 93
70 + 90 = 160
93 + 24 = 117
68 + 51 = 119
1 × 30 = 30
80 - 50 = 30