11~20的加减法+20以内加法（进位）+100以内整十加法 计算题
1.15 - 4 = 11
2.50 + 10 = 60
3.15 - 2 = 13
4.12 + 5 = 17
5.10 + 50 = 60
6.16 + 2 = 18
7.14 + 7 = 21
8.40 + 30 = 70
9.19 + 5 = 14
10.17 + 7 = 24
11.17 + 10 = 27
12.18 + 2 = 20
13.19 + 9 = 10
14.15 - 5 = 10
15.13 - 3 = 10
16.18 + 6 = 24
17.15 - 4 = 19
18.15 + 2 = 17
19.13 + 7 = 20
20.13 + 6 = 19
21.12 - 6 = 18
22.15 + 8 = 23
23.70 + 80 = 150
24.50 + 90 = 140
25.18 - 1 = 19
26.20 - 3 = 17
27.10 + 50 = 60
28.40 + 40 = 80
29.90 + 0 = 90
30.11 + 9 = 20
31.14 + 7 = 21
32.13 + 4 = 17
33.18 + 6 = 24
34.16 + 3 = 19
35.12 - 5 = 17
36.17 + 5 = 22
37.10 + 90 = 100
38.17 + 5 = 12
39.19 + 3 = 22