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 + 3 - 1 = 4
2.16 + 7 = 23
3.13 - 9 = 22
4.13 - 7 = 6
5.5 + 4 = 9
6.9 + 0 - 0 = 9
7.1 + 8 - 1 = 8
8.5 + 5 + 9 = 19
9.6 - 0 = 6
10.5 - 3 = 2
11.1 + 5 = 6
12.4 - 2 - 1 = 1
13.5 + 2 + 5 = 12
14.4 + 7 - 6 = 5
15.3 + 4 - 5 = 2
16.2 - 1 = 1
17.7 + 1 - 2 = 6
18.2 + 6 - 4 = 4
19.17 + 8 = 25
20.0 + 9 + 6 = 15
21.5 - 1 = 4
22.9 + 0 + 2 = 11
23.2 + 0 - 1 = 1
24.3 + 0 = 3
25.18 + 7 = 11
26.4 + 3 - 5 = 2
27.4 + 0 = 4
28.4 + 9 - 7 = 6
29.9 + 1 - 5 = 5
30.3 - 1 = 2
31.13 - 0 = 13
32.7 + 2 + 0 = 9
33.4 - 0 = 4
34.5 + 1 - 1 = 5
35.16 + 2 = 18
36.1 - 0 - 0 = 1
37.9 + 0 - 1 = 8
38.9 - 0 = 9
39.5 + 2 = 7