$\frac{3}{6\ }\ +\ \frac{2}{6}\ =$  

 $\frac{1}{11\ }\ +\ \frac{9}{11}\ =\$  

 $\frac{2}{3}\ +\ \frac{1}{2}\ =$  

 $\frac{1}{4}\ +\ \frac{1}{3}\ =$  

 $\frac{2}{5}\ \cdot\ \frac{3}{5}\ =$  

 $\frac{1}{4}\cdot\frac{5}{9}\ =$