3 + 3 =

(a)  

8 - 5 =

(a)  

9 + 4 =

(a)  

15 - 7 =

(a)  

8 + 8 =

(a)  

7 + 6 =

(a)  

11 - 7 =

(a)  

6 + 5 =

(a)  

12 - 6 =

(a)  

19 - 9 =

(a)  

4 + 4 + 4 =

(a)  

2 + 2 + 2 + 2 + 2 =

(a)  

15 - 5 - 5 =

(a)  

3 + 3 + 3 =

(a)  

10 - 2 - 2 - 2 =

(a)  

9 + 9 =

(a)  

20 - 10 =

(a)  

16 - 4 - 4 =

(a)  

6 + 6 + 6 =

(a)