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
1.15 - 2 - 1 = 12
2.9 + 0 - 0 = 9
3.1 + 3 = 4
4.2 + 2 - 8 = -4
5.4 + 0 + 9 = 13
6.7 + 1 + 3 = 11
7.5 - 2 = 3
8.1 - 0 = 1
9.8 + 1 - 8 = 1
10.13 + 7 = 20
11.1 + 2 = 3
12.0 + 6 - 7 = -1
13.11 + 9 = 2
14.6 - 0 = 6
15.15 + 3 = 18
16.0 + 4 + 6 = 10
17.6 - 4 = 2
18.14 - 9 - 1 = 4
19.16 + 3 = 19
20.5 - 1 = 4
21.11 - 7 = 18
22.16 + 10 = 26
23.3 + 1 + 7 = 11
24.4 - 2 - 1 = 1
25.3 + 6 = 9
26.10 + 4 = 14
27.9 - 7 = 2
28.19 - 17 - 8 = -6
29.19 - 12 - 3 = 4
30.15 - 7 = 8
31.4 + 8 + 2 = 14
32.9 + 2 - 3 = 8
33.17 - 6 = 11
34.7 + 1 - 7 = 1
35.11 + 5 = 16
36.5 + 3 + 6 = 14
37.14 + 6 = 20
38.19 + 4 = 23
39.1 + 1 + 8 = 10