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
1.16 + 7 = 23
2.12 + 1 = 13
3.15 + 4 = 19
4.17 + 2 = 19
5.0 + 2 + 0 = 2
6.4 + 6 + 6 = 16
7.3 - 2 = 1
8.9 + 0 - 3 = 6
9.14 - 6 - 3 = 5
10.9 + 9 - 0 = 18
11.7 + 2 - 6 = 3
12.9 + 0 = 9
13.8 + 1 - 8 = 1
14.1 + 5 + 0 = 6
15.9 - 1 - 0 = 8
16.13 + 3 = 16
17.10 + 6 = 16
18.12 + 10 = 22
19.19 - 7 - 4 = 8
20.8 - 7 - 5 = -4
21.2 - 0 = 2
22.1 + 3 - 9 = -5
23.2 + 6 + 8 = 16
24.9 + 7 - 2 = 14
25.18 + 6 = 24
26.8 + 0 - 1 = 7
27.0 + 8 - 0 = 8
28.4 - 1 = 3
29.6 + 9 - 5 = 10
30.12 + 1 = 13
31.4 + 0 - 0 = 4
32.0 + 0 = 0
33.0 - 0 - 0 = 0
34.7 + 2 - 3 = 6
35.9 - 3 = 6
36.16 + 1 = 15
37.3 + 7 - 9 = 1
38.3 - 2 = 1
39.10 + 7 = 17