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
1.7 + 2 - 1 = 8
2.7 + 6 - 0 = 13
3.1 + 1 = 2
4.7 + 0 = 7
5.5 + 0 = 5
6.3 + 4 = 7
7.2 + 0 = 2
8.16 + 6 = 22
9.16 + 6 = 22
10.5 + 0 = 5
11.6 - 5 = 1
12.9 + 2 + 7 = 18
13.18 + 10 = 28
14.1 + 6 - 8 = -1
15.3 - 2 = 1
16.16 - 6 - 5 = 5
17.19 - 9 = 10
18.7 - 3 = 4
19.1 - 0 = 1
20.18 - 8 = 10
21.0 + 2 - 0 = 2
22.13 + 4 = 17
23.6 + 9 - 3 = 12
24.18 - 5 - 1 = 12
25.6 + 0 = 6
26.3 + 8 - 5 = 6
27.5 + 2 - 1 = 6
28.8 + 1 = 9
29.13 + 5 = 18
30.7 - 1 = 6
31.8 - 6 = 2
32.12 - 2 = 10
33.15 + 6 = 9
34.3 - 1 = 2
35.5 + 7 + 4 = 16
36.5 - 2 = 3
37.0 + 1 = 1
38.0 - 0 - 0 = 0
39.9 - 6 = 3