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
1.6 + 5 - 3 = 8
2.9 + 0 = 9
3.9 + 5 - 1 = 13
4.2 - 1 - 0 = 1
5.8 - 0 = 8
6.17 + 8 = 25
7.6 + 0 - 8 = -2
8.13 + 0 = 13
9.8 - 3 = 5
10.12 + 7 = 19
11.9 - 2 - 0 = 7
12.13 + 3 = 16
13.7 - 2 = 5
14.9 + 0 = 9
15.13 + 9 = 22
16.2 + 3 - 2 = 3
17.11 + 1 = 12
18.2 + 9 + 5 = 16
19.4 + 0 + 0 = 4
20.2 + 5 + 0 = 7
21.5 + 8 - 2 = 11
22.18 + 7 = 25
23.7 + 1 - 0 = 8
24.3 - 2 - 1 = 0
25.14 - 2 = 12
26.13 - 6 - 0 = 7
27.0 + 3 - 1 = 2
28.5 + 8 + 8 = 21
29.16 - 7 = 9
30.7 + 2 - 0 = 9
31.5 + 6 + 8 = 19
32.5 + 7 - 4 = 8
33.2 - 1 = 1
34.4 + 2 - 2 = 4
35.9 - 5 = 4
36.2 + 8 - 9 = 1
37.14 + 5 = 19
38.14 + 8 = 22
39.15 - 3 - 1 = 11