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 - 1 - 0 = 2
2.3 + 5 = 8
3.2 + 7 + 1 = 10
4.10 + 2 = 12
5.0 + 9 - 4 = 5
6.7 + 2 - 3 = 6
7.4 - 0 = 4
8.6 + 8 - 1 = 13
9.11 + 5 = 16
10.18 + 2 = 20
11.8 + 3 - 2 = 9
12.8 + 0 - 2 = 6
13.16 + 9 = 25
14.7 + 0 + 9 = 16
15.17 + 1 = 18
16.4 - 3 = 1
17.12 + 2 = 14
18.15 - 10 - 5 = 0
19.7 - 1 = 6
20.13 + 4 = 17
21.18 - 16 - 15 = -13
22.17 + 6 = 23
23.6 - 3 - 2 = 1
24.19 + 1 = 20
25.16 + 5 = 21
26.6 + 2 - 3 = 5
27.3 + 1 = 4
28.9 + 0 = 9
29.1 + 6 + 2 = 9
30.4 + 5 - 5 = 4
31.20 + 9 = 11
32.9 + 0 - 1 = 8
33.20 + 2 = 22
34.3 + 9 + 8 = 20
35.16 + 5 = 21
36.3 - 2 - 1 = 0
37.1 + 3 = 4
38.10 + 2 = 12
39.3 - 2 - 1 = 0