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
1.4 + 1 - 1 = 4
2.2 + 7 - 1 = 8
3.2 - 1 - 0 = 1
4.8 + 1 - 8 = 1
5.17 + 6 = 23
6.17 - 3 = 14
7.14 + 3 = 17
8.2 + 4 - 4 = 2
9.3 + 4 = 7
10.2 + 5 + 0 = 7
11.0 + 0 - 6 = -6
12.9 + 0 = 9
13.17 + 4 = 21
14.8 + 1 - 3 = 6
15.2 + 5 - 4 = 3
16.5 - 1 - 0 = 4
17.0 - 0 = 0
18.7 + 2 - 8 = 1
19.9 - 1 = 8
20.1 + 8 + 3 = 12
21.4 + 4 = 8
22.9 + 0 - 4 = 5
23.16 - 2 = 18
24.9 + 6 - 3 = 12
25.18 - 2 - 1 = 15
26.9 + 9 - 5 = 13
27.7 + 0 = 7
28.1 - 0 - 0 = 1
29.1 + 3 + 3 = 7
30.3 + 4 = 7
31.4 - 2 - 1 = 1
32.18 + 9 = 9
33.2 + 2 = 4
34.1 + 6 - 3 = 4
35.9 + 3 + 2 = 14
36.1 - 0 = 1
37.8 - 6 - 2 = 0
38.9 + 8 + 9 = 26
39.5 - 1 = 4