20以内加法（进位） 口算题打印
1.15 + 5 = 20
2.12 + 1 = 13
3.19 + 9 = 28
4.16 + 5 = 21
5.11 + 5 = 16
6.11 + 1 = 12
7.10 + 10 = 20
8.15 + 6 = 21
9.10 + 1 = 11
10.19 + 7 = 26
11.18 + 9 = 27
12.13 + 9 = 22
13.10 + 7 = 17
14.15 + 2 = 17
15.19 + 8 = 27
16.14 + 8 = 22
17.10 + 5 = 15
18.15 + 4 = 19
19.17 + 9 = 26
20.17 + 3 = 20
21.11 + 8 = 19
22.15 + 2 = 17
23.12 + 8 = 20
24.13 + 5 = 18
25.12 + 3 = 15
26.12 + 6 = 18
27.18 + 10 = 28
28.15 + 9 = 24
29.12 + 3 = 15
30.19 + 2 = 21
31.16 + 3 = 19
32.15 + 2 = 17
33.12 + 1 = 13
34.15 + 3 = 18
35.13 + 2 = 15
36.12 + 1 = 13
37.19 + 7 = 26
38.17 + 3 = 20
39.12 + 3 = 15