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
1.11 - 7 = 4
2.5 + 9 + 8 = 22
3.3 + 8 - 7 = 4
4.10 + 3 = 13
5.14 - 3 - 0 = 11
6.17 + 2 = 15
7.8 - 6 = 2
8.16 + 5 = 21
9.7 + 6 + 8 = 21
10.1 + 7 - 0 = 8
11.3 + 5 + 6 = 14
12.11 - 4 = 7
13.15 + 3 = 18
14.2 + 5 - 1 = 6
15.0 + 8 - 2 = 6
16.13 + 5 = 18
17.3 + 3 - 1 = 5
18.14 + 2 = 16
19.7 + 6 + 0 = 13
20.2 - 0 = 2
21.12 - 10 - 7 = -5
22.7 + 0 - 0 = 7
23.0 + 1 + 9 = 10
24.6 + 8 - 8 = 6
25.0 - 0 = 0
26.3 - 0 = 3
27.2 + 0 + 6 = 8
28.14 + 4 = 18
29.9 - 7 - 6 = -4
30.12 + 4 = 16
31.1 + 6 - 9 = -2
32.9 - 5 = 4
33.0 + 3 - 4 = -1
34.17 - 3 - 0 = 14
35.5 + 2 + 4 = 11
36.2 + 5 - 2 = 5
37.13 - 10 - 7 = -4
38.3 + 2 - 3 = 2
39.5 + 1 - 0 = 6