10以内的加法+10以内的减法+10以内的加减混合+10以内连加+10以内连减+10以内加减混合+11~20的加减法+20以内加法（进位） 计算题
1.2 + 8 - 6 = 4
2.18 - 9 - 8 = 1
3.1 + 0 + 6 = 7
4.9 - 4 = 5
5.1 - 0 = 1
6.12 + 4 = 16
7.1 + 8 - 0 = 9
8.14 + 2 = 16
9.6 + 0 = 6
10.9 - 6 = 3
11.13 + 3 = 16
12.2 + 3 - 3 = 2
13.9 + 0 - 2 = 7
14.6 - 5 = 1
15.2 + 9 - 7 = 4
16.14 + 2 = 16
17.9 + 0 - 2 = 7
18.11 + 3 = 14
19.15 + 1 = 14
20.17 + 5 = 22
21.6 + 9 + 5 = 20
22.13 - 5 = 18
23.3 - 0 = 3
24.9 + 0 - 3 = 6
25.9 + 0 = 9
26.6 - 5 = 1
27.18 - 8 - 7 = 3
28.3 + 3 = 6
29.0 - 0 - 0 = 0
30.14 + 4 = 18
31.8 + 5 + 9 = 22
32.11 + 6 = 17
33.0 + 5 = 5
34.9 + 0 = 9
35.13 - 0 = 13
36.4 - 2 = 2
37.7 + 0 - 4 = 3
38.4 - 0 = 4
39.19 - 2 - 1 = 16