11~20的加减法 计算题
1.18 + 9 = 9
2.17 - 0 = 17
3.14 + 9 = 23
4.18 - 2 = 16
5.11 + 4 = 15
6.12 + 7 = 19
7.18 - 8 = 26
8.20 + 4 = 16
9.12 - 2 = 14
10.20 - 3 = 17
11.11 - 7 = 18
12.18 - 4 = 22
13.11 + 4 = 15
14.11 - 4 = 15
15.13 - 8 = 21
16.14 - 7 = 21
17.13 - 2 = 15
18.12 + 7 = 19
19.16 - 1 = 15
20.12 - 9 = 21
21.20 - 1 = 21
22.19 - 3 = 16
23.12 + 3 = 9
24.11 - 2 = 13
25.18 + 0 = 18
26.16 + 6 = 10
27.14 + 4 = 18
28.12 - 6 = 18
29.13 - 0 = 13
30.11 - 8 = 19
31.13 + 2 = 15
32.17 + 4 = 13
33.18 + 4 = 14
34.13 + 1 = 14
35.19 + 2 = 21
36.18 + 0 = 18
37.16 - 6 = 22
38.13 + 1 = 14
39.16 + 2 = 18
40.13 - 6 = 7
41.15 + 9 = 6
42.14 + 5 = 9
43.19 + 4 = 15
44.16 - 5 = 11
45.14 - 3 = 11
46.13 + 6 = 7
47.19 + 6 = 13
48.16 + 6 = 10
49.18 + 3 = 21
50.20 + 6 = 14