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
1.18 + 7 = 25
2.12 + 8 = 20
3.0 + 7 - 3 = 4
4.11 + 7 = 4
5.6 + 1 = 7
6.6 + 3 - 5 = 4
7.5 + 9 - 8 = 6
8.13 + 9 = 22
9.14 - 7 = 21
10.7 - 3 = 4
11.5 - 2 = 3
12.17 + 9 = 26
13.6 - 5 - 2 = -1
14.9 + 0 + 1 = 10
15.18 + 1 = 19
16.0 + 9 - 0 = 9
17.8 + 1 = 9
18.2 + 6 = 8
19.1 - 0 = 1
20.1 - 0 = 1
21.0 + 4 + 3 = 7
22.12 - 3 - 1 = 8
23.11 + 5 = 16
24.5 + 3 = 8
25.1 + 3 + 2 = 6
26.9 + 1 - 4 = 6
27.3 + 1 + 6 = 10
28.6 + 1 = 7
29.8 + 8 - 4 = 12
30.3 - 1 = 2
31.10 + 2 = 12
32.8 + 3 + 0 = 11
33.18 - 4 - 2 = 12
34.19 + 8 = 27
35.16 + 3 = 13
36.5 - 3 = 2
37.5 + 8 + 4 = 17
38.2 + 0 + 1 = 3
39.1 + 2 + 2 = 5