11~20的加减法+20以内加法（进位） 计算题
1.12 + 0 = 12
2.12 + 6 = 18
3.12 + 3 = 15
4.12 + 7 = 19
5.18 + 1 = 19
6.11 - 7 = 4
7.19 + 1 = 20
8.18 + 6 = 24
9.17 + 4 = 21
10.16 + 9 = 25
11.14 + 8 = 22
12.14 - 4 = 18
13.11 + 4 = 7
14.20 + 4 = 16
15.12 + 3 = 15
16.17 + 2 = 19
17.16 + 0 = 16
18.15 + 10 = 25
19.18 + 6 = 24
20.20 + 6 = 14
21.14 + 4 = 18
22.19 + 10 = 29
23.11 - 6 = 5
24.18 + 4 = 14
25.18 + 1 = 19
26.16 + 7 = 23
27.14 + 8 = 22
28.13 + 4 = 17
29.12 + 8 = 4
30.17 + 8 = 25
31.12 + 10 = 22
32.13 + 2 = 15
33.12 + 5 = 17
34.16 - 6 = 22
35.19 + 6 = 25
36.15 + 2 = 17
37.15 + 3 = 18
38.11 + 3 = 14
39.14 - 9 = 5