5 - 3 =

(a)  

6 - 3 =

(a)  

6 - 4 =

(a)  

7 - 3 =

(a)  

7 - 5 =

(a)  

8 - 2 =

(a)  

8 - 4 =

(a)  

9 - 4 =

(a)  

9 - 7 =

(a)  

10 - 2 =

(a)  

10 - 4 =

(a)