11~20的加减法 计算题
1.13 + 9 = 22
2.14 + 3 = 17
3.18 + 9 = 9
4.18 + 2 = 20
5.19 - 7 = 12
6.12 + 2 = 14
7.11 - 6 = 17
8.17 - 4 = 13
9.11 - 1 = 10
10.13 + 3 = 10
11.17 + 2 = 15
12.11 - 5 = 16
13.16 - 4 = 20
14.11 + 3 = 8
15.13 - 0 = 13
16.11 - 6 = 17
17.15 + 1 = 14
18.18 + 9 = 9
19.14 - 3 = 17
20.14 + 0 = 14
21.19 - 0 = 19
22.19 + 3 = 22
23.12 + 3 = 15
24.18 - 7 = 25
25.13 - 6 = 19
26.17 - 7 = 10
27.11 + 5 = 6
28.11 - 2 = 13
29.11 + 0 = 11
30.15 + 1 = 14
31.15 - 4 = 11
32.18 - 7 = 11
33.12 - 5 = 17
34.20 + 0 = 20
35.11 + 5 = 6
36.12 + 8 = 4
37.18 - 3 = 21
38.12 + 1 = 11
39.17 - 8 = 25