7 - 3 =

(a)  

10 - 3 =

(a)  

12 - 3 =

(a)  

4 - 3 =

(a)  

5 - 3 =

(a)  

13 - 3 =

(a)  

6 - 3 =

(a)  

11 - 3 =

(a)  

8 - 3 =

(a)