11~20的加减法 计算题
1.16 + 9 = 25
2.18 - 6 = 24
3.20 - 2 = 18
4.16 + 0 = 16
5.19 - 1 = 18
6.20 - 5 = 25
7.19 - 5 = 24
8.19 + 5 = 24
9.12 - 9 = 3
10.17 + 1 = 16
11.15 + 7 = 8
12.15 + 7 = 22
13.14 + 9 = 5
14.19 + 3 = 16
15.16 - 1 = 17
16.19 + 0 = 19
17.13 - 5 = 18
18.14 - 5 = 19
19.19 + 9 = 28
20.17 - 3 = 20
21.20 - 3 = 23
22.13 - 2 = 15
23.12 - 1 = 11
24.15 + 9 = 6
25.17 + 4 = 13
26.13 - 6 = 7
27.18 + 1 = 17
28.18 - 2 = 20
29.19 - 6 = 13
30.19 + 1 = 18
31.12 + 8 = 4
32.16 + 5 = 11
33.14 - 1 = 15
34.20 - 9 = 29
35.20 + 7 = 27
36.13 - 5 = 8
37.17 + 0 = 17
38.13 - 4 = 9
39.15 - 1 = 16