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
1.3 + 0 = 3
2.2 - 0 = 2
3.8 + 2 - 5 = 5
4.7 - 3 - 2 = 2
5.8 + 2 + 5 = 15
6.2 + 4 + 4 = 10
7.1 - 0 - 0 = 1
8.4 + 2 - 1 = 5
9.2 + 5 + 5 = 12
10.14 + 1 = 15
11.12 + 8 = 20
12.19 + 1 = 20
13.13 - 6 = 19
14.2 + 2 - 7 = -3
15.0 + 4 - 7 = -3
16.9 + 0 + 3 = 12
17.0 + 8 - 9 = -1
18.9 + 0 = 9
19.11 - 3 - 2 = 6
20.1 + 0 = 1
21.6 + 2 = 8
22.16 + 1 = 17
23.9 + 0 = 9
24.15 + 2 = 17
25.9 + 0 - 6 = 3
26.17 + 3 = 20
27.11 + 4 = 15
28.12 - 9 = 21
29.8 + 8 - 8 = 8
30.0 + 1 = 1
31.1 - 0 = 1
32.6 + 0 - 1 = 5
33.0 + 9 + 0 = 9
34.17 + 10 = 27
35.11 - 3 - 2 = 6
36.2 + 6 - 2 = 6
37.7 + 7 - 7 = 7
38.8 + 2 + 8 = 18
39.19 + 8 = 27