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
1.3 + 2 - 4 = 1
2.3 + 6 = 9
3.19 + 8 = 27
4.17 - 14 - 8 = -5
5.3 + 4 - 0 = 7
6.15 - 0 = 15
7.2 - 1 = 1
8.16 - 5 = 11
9.2 - 1 = 1
10.9 + 0 - 4 = 5
11.0 - 0 = 0
12.8 - 6 = 2
13.9 - 0 - 0 = 9
14.2 + 3 - 4 = 1
15.5 - 1 = 4
16.19 + 3 = 22
17.8 + 1 = 9
18.2 - 0 = 2
19.6 + 0 - 3 = 3
20.17 + 6 = 11
21.4 + 5 - 3 = 6
22.11 - 4 = 15
23.13 - 9 = 22
24.9 + 0 = 9
25.2 + 5 + 4 = 11
26.1 + 7 + 4 = 12
27.11 + 9 = 20
28.6 - 1 - 0 = 5
29.9 + 0 - 4 = 5
30.9 + 0 - 4 = 5
31.14 + 9 = 23
32.15 + 5 = 20
33.9 - 6 = 3
34.18 - 16 - 10 = -8
35.15 + 5 = 20
36.16 + 3 = 19
37.17 + 2 = 19
38.5 + 6 - 7 = 4
39.18 - 9 = 9