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
1.9 - 6 - 3 = 0
2.20 + 4 = 24
3.7 + 8 - 0 = 15
4.17 + 4 = 21
5.20 + 7 = 13
6.7 + 0 - 0 = 7
7.3 + 2 = 5
8.9 + 0 = 9
9.1 + 6 - 2 = 5
10.1 + 7 - 1 = 7
11.11 - 7 = 4
12.2 + 3 - 1 = 4
13.12 - 10 - 3 = -1
14.1 + 2 + 6 = 9
15.4 + 5 = 9
16.8 + 3 - 4 = 7
17.2 + 3 + 0 = 5
18.8 + 1 = 9
19.1 + 7 - 7 = 1
20.8 + 0 + 0 = 8
21.2 + 2 - 3 = 1
22.12 + 10 = 22
23.2 + 1 - 1 = 2
24.4 + 4 + 4 = 12
25.1 + 8 - 2 = 7
26.6 + 5 - 9 = 2
27.9 + 2 - 6 = 5
28.6 + 1 = 7
29.5 + 9 - 5 = 9
30.18 - 9 = 9
31.3 + 3 - 5 = 1
32.3 - 1 - 0 = 2
33.4 + 3 = 7
34.6 - 1 = 5
35.0 + 6 + 0 = 6
36.1 - 0 = 1
37.11 - 6 = 17
38.20 - 2 = 18
39.5 + 6 - 7 = 4