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
1.13 + 8 = 21
2.19 - 2 - 1 = 16
3.13 + 1 = 14
4.4 + 3 - 5 = 2
5.13 + 2 = 15
6.8 + 0 = 8
7.0 - 0 = 0
8.10 + 1 = 11
9.4 + 3 - 2 = 5
10.4 + 0 - 2 = 2
11.3 - 1 - 0 = 2
12.11 + 2 = 13
13.0 + 1 = 1
14.6 + 3 - 9 = 0
15.18 + 8 = 10
16.6 + 1 - 7 = 0
17.7 + 2 - 0 = 9
18.5 - 2 - 1 = 2
19.14 + 9 = 23
20.9 - 3 - 2 = 4
21.12 + 9 = 21
22.1 + 6 = 7
23.15 + 7 = 22
24.7 + 0 - 6 = 1
25.18 + 9 = 27
26.5 + 1 = 6
27.11 + 7 = 18
28.15 + 7 = 22
29.9 + 0 - 3 = 6
30.8 - 5 = 3
31.8 + 7 + 4 = 19
32.2 + 1 + 5 = 8
33.8 + 1 = 9
34.5 + 4 - 7 = 2
35.6 - 1 - 0 = 5
36.4 + 5 - 2 = 7
37.8 + 0 - 2 = 6
38.13 + 7 = 20
39.6 - 2 - 0 = 4