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
1.4 + 2 + 8 = 14
2.9 - 2 - 1 = 6
3.9 + 3 - 2 = 10
4.5 + 3 = 8
5.11 + 6 = 17
6.20 + 1 = 19
7.16 + 3 = 13
8.9 - 5 = 4
9.18 + 3 = 15
10.1 + 3 - 3 = 1
11.12 + 1 = 13
12.9 + 2 + 2 = 13
13.9 + 0 = 9
14.5 + 7 - 8 = 4
15.1 + 1 = 2
16.8 - 7 = 1
17.0 + 5 - 1 = 4
18.2 + 4 - 0 = 6
19.18 - 8 = 10
20.3 + 2 - 6 = -1
21.3 + 4 - 6 = 1
22.9 - 6 - 0 = 3
23.6 + 3 = 9
24.0 - 0 = 0
25.5 - 4 - 3 = -2
26.6 + 6 + 8 = 20
27.19 + 5 = 24
28.19 + 8 = 27
29.3 + 0 - 1 = 2
30.18 + 4 = 22
31.9 + 4 + 7 = 20
32.9 + 0 = 9
33.4 + 0 - 2 = 2
34.8 - 6 = 2
35.0 + 0 - 9 = -9
36.7 + 0 - 0 = 7
37.4 - 3 = 1
38.5 + 8 + 9 = 22
39.18 + 10 = 28