0 + 7 = (a)  

9 + 8 = (a)  

6 + 5 + 9 = (a)  

3 + 8 + 7 = (a)  

3 4 + 4 = (a)  

2 7 + 6 2 = (a)  

        4 1

(a)  

3 8 + 5 3 = (a)  

6 5 + 2 8 = (a)