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
1.1 + 1 - 0 = 2
2.14 + 9 = 23
3.5 + 3 = 8
4.2 - 0 = 2
5.6 - 0 = 6
6.9 + 3 + 9 = 21
7.19 + 2 = 17
8.9 - 2 = 7
9.7 + 0 - 1 = 6
10.2 - 0 = 2
11.11 - 8 - 3 = 0
12.8 + 0 - 6 = 2
13.0 + 7 - 2 = 5
14.1 - 0 - 0 = 1
15.0 + 4 - 2 = 2
16.4 + 5 - 6 = 3
17.20 + 7 = 27
18.1 - 0 = 1
19.2 - 0 = 2
20.9 + 0 = 9
21.15 + 7 = 22
22.20 - 6 = 14
23.4 + 4 - 0 = 8
24.6 + 4 + 2 = 12
25.11 - 10 - 8 = -7
26.3 + 0 - 8 = -5
27.17 - 2 = 19
28.8 + 9 + 5 = 22
29.15 + 9 = 24
30.9 + 0 - 5 = 4
31.0 + 3 = 3
32.3 + 4 + 9 = 16
33.2 - 1 = 1
34.2 - 1 - 0 = 1
35.11 - 9 - 5 = -3
36.3 + 6 = 9
37.9 + 1 + 5 = 15
38.4 + 7 - 3 = 8
39.1 + 4 = 5