20以内加法（进位）+100以内整十加法+100以内整十减法 计算题
1.30 - 0 = 30
2.18 + 2 = 20
3.90 - 60 = 30
4.50 - 20 = 30
5.20 + 30 = 50
6.70 - 30 = 40
7.10 + 3 = 13
8.16 + 6 = 22
9.12 + 2 = 14
10.70 + 60 = 130
11.10 + 90 = 100
12.18 + 7 = 25
13.10 + 10 = 20
14.70 - 20 = 50
15.60 + 20 = 80
16.70 + 50 = 120
17.30 - 20 = 10
18.16 + 3 = 19
19.0 + 30 = 30
20.19 + 6 = 25
21.90 - 70 = 20
22.50 - 20 = 30
23.20 - 10 = 10
24.19 + 6 = 25
25.13 + 2 = 15
26.10 + 50 = 60
27.16 + 1 = 17
28.30 + 40 = 70
29.0 - 0 = 0
30.80 + 90 = 170
31.50 + 0 = 50
32.14 + 1 = 15
33.12 + 9 = 21
34.60 - 10 = 50
35.16 + 7 = 23
36.10 + 90 = 100
37.15 + 1 = 16
38.19 + 6 = 25
39.80 - 30 = 50