3 + 0 =

(a)  

2 + 1 =

(a)  

4 + 2 =

(a)  

5 + 0 =

(a)  

3 + 2 =

(a)  

4 + 0 =

(a)  

0 + 0 =

(a)  

5 + 1

(a)  

2 + 2

(a)