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 - 0 = 4
2.16 + 0 = 16
3.3 + 0 - 0 = 3
4.1 + 4 - 1 = 4
5.0 + 0 - 0 = 0
6.3 - 1 - 0 = 2
7.2 - 1 = 1
8.4 + 1 - 2 = 3
9.9 + 8 + 8 = 25
10.8 - 1 = 7
11.1 - 0 = 1
12.10 - 7 - 6 = -3
13.1 + 0 = 1
14.18 + 2 = 16
15.0 + 2 + 2 = 4
16.11 - 8 = 19
17.2 + 2 = 4
18.16 + 1 = 15
19.4 - 2 - 0 = 2
20.3 + 7 - 0 = 10
21.12 + 3 = 9
22.8 + 1 = 9
23.3 - 1 = 2
24.1 + 9 + 0 = 10
25.4 - 3 = 1
26.9 + 0 - 2 = 7
27.3 + 6 = 9
28.5 + 3 = 8
29.15 + 7 = 8
30.4 + 2 = 6
31.7 + 0 + 9 = 16
32.11 + 3 = 14
33.3 - 0 - 0 = 3
34.3 + 7 + 9 = 19
35.8 - 7 - 0 = 1
36.17 - 1 = 18
37.2 - 1 = 1
38.2 + 4 = 6
39.8 + 6 - 1 = 13