11~20的加减法+20以内加法（进位） 计算题
1.14 + 5 = 19
2.10 + 1 = 11
3.12 + 6 = 18
4.18 - 6 = 24
5.17 + 4 = 21
6.14 + 3 = 17
7.12 + 7 = 5
8.18 - 3 = 21
9.20 + 3 = 23
10.13 + 8 = 21
11.13 + 8 = 21
12.13 - 2 = 11
13.18 + 10 = 28
14.11 - 0 = 11
15.13 + 4 = 17
16.11 + 7 = 18
17.12 + 8 = 20
18.17 + 3 = 20
19.15 - 3 = 12
20.18 + 7 = 25
21.16 + 2 = 14
22.15 + 6 = 21
23.17 + 2 = 15
24.14 + 4 = 18
25.16 - 7 = 9
26.13 + 7 = 20
27.10 + 3 = 13
28.18 + 5 = 13
29.18 + 3 = 21
30.11 - 5 = 6
31.17 + 2 = 19
32.15 + 6 = 21
33.19 + 3 = 22
34.11 - 7 = 4
35.10 + 8 = 18
36.10 + 1 = 11
37.11 + 8 = 19
38.20 - 1 = 21
39.19 + 7 = 26