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 + 0 - 5 = 4
2.9 + 2 + 1 = 12
3.9 - 2 = 7
4.10 + 9 = 19
5.8 - 4 = 4
6.0 + 3 + 4 = 7
7.17 - 15 - 3 = -1
8.7 + 8 + 9 = 24
9.6 + 7 - 1 = 12
10.0 + 1 - 4 = -3
11.6 + 0 - 2 = 4
12.5 + 1 - 2 = 4
13.0 + 6 + 4 = 10
14.8 + 2 + 7 = 17
15.5 - 1 = 4
16.15 - 14 - 12 = -11
17.9 + 0 - 8 = 1
18.11 + 6 = 17
19.8 + 0 - 4 = 4
20.5 + 6 - 7 = 4
21.0 + 7 - 1 = 6
22.6 + 3 = 9
23.0 + 4 + 0 = 4
24.1 + 6 - 5 = 2
25.6 - 3 = 3
26.17 - 2 - 0 = 15
27.3 + 6 - 7 = 2
28.16 + 7 = 23
29.20 + 6 = 26
30.9 - 3 - 1 = 5
31.7 + 2 - 2 = 7
32.0 + 0 = 0
33.12 + 9 = 21
34.11 - 4 = 15
35.11 + 9 = 20
36.14 + 6 = 20
37.2 + 0 - 3 = -1
38.7 + 8 - 4 = 11
39.0 + 8 - 6 = 2