Addition & subtraction within 20 (Grade 1)

16 - 2 =

10 - 9 =

11 - 11 =

8 - 5 =

20 - 9 =

15 - 14 =

9 - 5 =

8 - 7 =

4 + 15 =

14 - 2 =

2 + 4 =

9 - 1 =

17 - 12 =

5 + 1 =

19 - 16 =

5 + 14 =

11 - 2 =

20 - 9 =

3 + 7 =

13 - 1 =

12 - 6 =

16 - 3 =

3 + 2 =

4 + 4 =

18 - 10 =

6 - 1 =

6 + 4 =

8 + 9 =

20 - 13 =

17 + 1 =

17 + 2 =

15 + 2 =

18 - 18 =

11 - 6 =

14 - 3 =

8 - 4 =

6 + 1 =

5 + 8 =

14 - 2 =

15 - 6 =