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 - 3 = 6
2.18 + 3 = 21
3.0 + 7 - 9 = -2
4.10 - 3 - 2 = 5
5.8 + 1 = 9
6.2 - 0 = 2
7.9 - 5 - 2 = 2
8.20 + 2 = 22
9.2 + 2 - 0 = 4
10.9 + 0 + 7 = 16
11.15 - 2 = 17
12.5 + 9 + 8 = 22
13.3 + 3 = 6
14.1 + 2 - 6 = -3
15.7 + 0 - 4 = 3
16.7 + 2 + 1 = 10
17.12 + 1 = 13
18.20 + 4 = 24
19.1 - 0 = 1
20.4 + 4 = 8
21.2 + 2 - 1 = 3
22.7 + 2 - 0 = 9
23.1 + 0 - 0 = 1
24.16 - 2 - 0 = 14
25.0 - 0 - 0 = 0
26.19 - 5 = 14
27.3 + 3 + 8 = 14
28.2 + 3 - 6 = -1
29.3 + 2 - 2 = 3
30.1 + 8 + 0 = 9
31.12 - 2 - 1 = 9
32.7 + 2 - 8 = 1
33.18 - 14 - 11 = -7
34.5 + 1 + 1 = 7
35.9 - 7 - 4 = -2
36.8 - 2 - 1 = 5
37.4 - 3 = 1
38.18 - 1 - 0 = 17
39.19 + 8 = 27