$\frac{1}{3}-\frac{1}{4}=$  

 $\frac{1}{10}\cdot\frac{10}{1}=$  

 $\frac{3}{8}\cdot8=$  

 $\frac{1}{5}+\frac{3}{5}=$  

 $\frac{6}{10}+\frac{4}{10}=$  

 $\frac{3}{8}+\frac{4}{8}=$  

 $\frac{1}{2}:\frac{1}{2}=$  

 $\frac{4}{9}\cdot\frac{1}{9}=$  

 $\frac{1}{5}-\frac{1}{6}=$  

 $1-\frac{1}{9}=$