13 + 5 =

(a)  

7 - 5 =

(a)  

14 + 3 =

(a)  

4 + 1 =

(a)  

6 + 6 =

(a)  

10 + 1 =

(a)  

12 + 7 =

(a)  

12 - 2 =

(a)  

4 + 10 =

(a)