$\frac{5}{9}\ +\ \frac{1}{9\ }\ \ =$  

(a)  

 $\frac{4}{7}\ +\ \frac{1}{7}\ =$  

(a)  

 $\frac{2}{8}\ +\ \frac{2}{8}\ =$  

(a)  

 $\frac{2}{6}\ +\ \frac{2}{6}\ \ =$  

(a)  

 $\frac{1}{2}\ +\ \frac{1}{4}\ =$  

(a)  

 $\frac{4}{8}\ +\ \frac{1}{4}\ \ =$  

(a)  

 $\frac{4}{8}\ +\ \frac{1}{4}\ =$  

(a)  

 $\frac{5}{8}\ \ +\ \frac{1}{4}\ =$  

(a)  

 $\frac{1}{3}\ +\ \frac{3}{6}\ =$  

(a)  

 $\frac{1}{6}\ +\ \frac{2}{3}\ =$  

(a)  

 $\frac{2}{5}\ +\ \frac{1}{10}\ =$  

(a)