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
1.14 - 7 = 7
2.11 + 1 = 12
3.0 + 1 - 0 = 1
4.2 + 8 + 1 = 11
5.0 + 8 + 0 = 8
6.9 + 0 - 3 = 6
7.4 - 0 = 4
8.3 + 6 - 0 = 9
9.17 - 3 - 0 = 14
10.4 + 1 = 5
11.17 + 9 = 26
12.7 + 1 = 8
13.7 - 6 = 1
14.18 + 9 = 27
15.13 + 6 = 19
16.9 + 0 + 8 = 17
17.5 - 0 = 5
18.9 - 0 = 9
19.11 - 9 = 2
20.10 + 10 = 20
21.7 + 8 - 2 = 13
22.14 - 13 - 6 = -5
23.3 + 3 - 5 = 1
24.7 + 0 = 7
25.1 + 0 - 0 = 1
26.12 - 8 = 4
27.15 - 3 - 1 = 11
28.7 + 0 = 7
29.12 + 8 = 20
30.7 + 2 - 6 = 3
31.15 - 7 = 8
32.1 + 4 = 5
33.15 + 1 = 16
34.2 + 0 - 2 = 0
35.13 + 9 = 22
36.3 + 8 - 9 = 2
37.5 + 1 + 1 = 7
38.8 + 0 = 8
39.2 + 1 = 3