20以内加法（进位） 计算题
1.10 + 9 = 19
2.15 + 5 = 20
3.19 + 7 = 26
4.18 + 9 = 27
5.14 + 7 = 21
6.19 + 2 = 21
7.13 + 8 = 21
8.12 + 5 = 17
9.17 + 6 = 23
10.12 + 4 = 16
11.11 + 2 = 13
12.13 + 5 = 18
13.17 + 10 = 27
14.18 + 4 = 22
15.16 + 3 = 19
16.12 + 5 = 17
17.19 + 7 = 26
18.10 + 9 = 19
19.13 + 5 = 18
20.15 + 7 = 22
21.15 + 4 = 19
22.14 + 2 = 16
23.11 + 3 = 14
24.14 + 2 = 16
25.13 + 5 = 18
26.13 + 2 = 15
27.13 + 10 = 23
28.15 + 2 = 17
29.19 + 9 = 28
30.14 + 2 = 16
31.17 + 10 = 27
32.14 + 3 = 17
33.16 + 2 = 18
34.15 + 4 = 19
35.10 + 4 = 14
36.15 + 2 = 17
37.12 + 3 = 15
38.12 + 5 = 17
39.13 + 5 = 18