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
1.8 - 0 - 0 = 8
2.12 + 10 = 22
3.11 - 2 - 1 = 8
4.9 + 0 - 2 = 7
5.7 + 4 + 0 = 11
6.19 + 8 = 27
7.4 + 5 - 0 = 9
8.16 + 9 = 7
9.9 + 2 - 8 = 3
10.3 - 2 = 1
11.17 - 16 - 12 = -11
12.12 - 8 = 4
13.5 - 0 = 5
14.16 - 7 - 3 = 6
15.11 + 3 = 8
16.4 + 2 = 6
17.6 + 3 = 9
18.17 - 13 - 1 = 3
19.2 + 1 = 3
20.15 - 9 - 5 = 1
21.15 + 2 = 17
22.12 + 9 = 21
23.1 + 9 + 2 = 12
24.2 + 6 + 4 = 12
25.8 + 0 - 0 = 8
26.9 - 3 = 6
27.13 + 6 = 7
28.7 + 4 - 3 = 8
29.1 + 3 + 3 = 7
30.11 + 10 = 21
31.1 - 0 = 1
32.4 + 5 = 9
33.12 + 5 = 17
34.3 - 0 = 3
35.2 - 1 = 1
36.18 + 1 = 19
37.0 + 9 - 1 = 8
38.3 + 7 - 7 = 3
39.8 + 0 = 8