Addition and Subtraction of Similar Fractions

 $\frac{1}{3}$   $+$   $\frac{2}{3}$  is equal to ________.

What is the sum of $\frac{6}{8}$ and $\frac{5}{8}$  ?

Give the difference of  $\frac{8}{13}$  and  $\frac{5}{13}$ .

 $\frac{7}{14}$   $-$   $\frac{5}{14}$   $=$  ?

Which is not a step in adding similar fraction?

What is missing term in this mathematical sentence; $\frac{9}{17}$  $-$  ______  $=$    $\frac{4}{17}$  ?

 $\frac{6}{20}$   $+$   $\frac{7}{20}$   $=$   (a)  

 $\frac{7}{10}$   $-$   $\frac{2}{10}$   $=$   (a)