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
1.17 - 8 - 3 = 6
2.9 + 0 - 3 = 6
3.5 + 1 - 2 = 4
4.7 + 6 - 9 = 4
5.3 + 3 - 0 = 6
6.5 + 0 - 2 = 3
7.6 - 1 = 5
8.16 + 1 = 17
9.1 + 5 - 8 = -2
10.8 + 0 + 0 = 8
11.0 - 0 = 0
12.0 + 3 = 3
13.14 + 6 = 20
14.8 + 1 = 9
15.15 + 8 = 23
16.14 + 2 = 16
17.0 + 3 = 3
18.15 - 13 - 2 = 0
19.12 - 9 = 21
20.19 - 0 = 19
21.4 + 7 - 6 = 5
22.11 + 1 = 12
23.15 - 8 = 23
24.4 + 1 + 0 = 5
25.2 - 1 - 0 = 1
26.6 + 9 + 4 = 19
27.12 + 1 = 13
28.3 + 4 + 4 = 11
29.7 + 1 - 3 = 5
30.7 + 2 - 7 = 2
31.6 - 0 = 6
32.16 + 1 = 17
33.13 + 5 = 18
34.5 + 0 = 5
35.0 + 3 - 0 = 3
36.2 - 0 = 2
37.7 - 1 = 6
38.8 + 0 - 7 = 1
39.2 + 6 + 4 = 12