$\frac{3}{8}\ +\ \frac{2}{8}\ =$  

(a)  

 $\frac{1}{2}\ +\ \frac{1}{3}\ =$  

(a)  

 $\frac{3}{10}\ +\ \frac{2}{5}\ =$  

(a)  

 $\frac{1}{4}\ +\ \frac{1}{4}\ =$  

(a)  

 $\frac{3}{6}\ +\ \frac{2}{6}\ \ =$  

(a)  

 $\frac{1}{5}\ +\ \frac{4}{10}\ =$  

(a)  

 $\frac{1}{2}\ +\ \frac{1}{2}\ =$  

(a)  

 $\frac{1}{3}\ +\ \frac{2}{9}\ \ =$  

(a)  

 $\frac{3}{8}\ +\ \frac{2}{4}\ \ =$  

(a)