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
1.6 + 1 = 7
2.8 + 0 - 4 = 4
3.14 + 8 = 22
4.4 + 3 + 9 = 16
5.8 - 6 = 2
6.17 - 2 - 0 = 15
7.0 - 0 = 0
8.0 - 0 = 0
9.3 + 4 - 5 = 2
10.9 - 6 = 3
11.2 + 7 + 6 = 15
12.4 + 3 + 9 = 16
13.0 + 7 - 6 = 1
14.1 - 0 = 1
15.7 + 4 - 0 = 11
16.2 - 1 = 1
17.8 - 1 = 7
18.5 + 8 + 8 = 21
19.0 - 0 = 0
20.15 + 7 = 22
21.17 + 1 = 18
22.2 - 0 = 2
23.4 - 1 = 3
24.2 + 0 + 1 = 3
25.5 + 0 = 5
26.5 + 0 = 5
27.8 + 4 + 1 = 13
28.9 - 0 = 9
29.4 - 0 = 4
30.15 + 5 = 20
31.14 + 3 = 17
32.4 + 8 + 5 = 17
33.9 + 0 = 9
34.1 - 0 - 0 = 1
35.5 - 2 = 3
36.8 + 0 = 8
37.5 - 2 = 3
38.0 - 0 = 0
39.9 - 3 = 6
40.2 + 4 + 2 = 8
41.3 + 0 = 3
42.13 - 3 = 16
43.0 + 7 - 9 = -2
44.14 - 0 - 0 = 14
45.3 + 6 - 5 = 4
46.1 + 6 = 7
47.7 + 1 - 1 = 7
48.19 - 8 - 6 = 5
49.8 - 2 = 6
50.13 + 1 = 14