addition and subtracting with like denominators

 $\frac{1}{8}+\frac{4}{8\ }\ =\ ?$  

Karen cleaned   $\frac{2}{4}$  of the hallway mirror. Pat cleaned  $\frac{1}{4\ }$   of the mirror. How much of the mirror have they cleaned?

 $\frac{2}{9}_{ }+\frac{3}{9\ }=?$  

Peter washed  $\frac{5}{7}$  of the windows at home yesterday. Janet washed  $\frac{1}{7}$  of the windows today. How much of the window washing have they done?

 $\frac{4}{13}\ +\frac{7}{13}\ =?$   

Bonnie is cooking soup. She has  $\frac{7}{8}$  cup of chopped celery. She puts  $\frac{5}{8}$  cup into the soup. How much of the celery is left?

 $\frac{8}{10}-\frac{2}{10}=?$  

Mary  has a  $\frac{6}{8}$  cups of diced carrots. She uses  $\frac{3}{8}$  of the cup in the soup. How much of the cup of carrots is left?

 $\frac{4}{8\ }\ -\ \frac{3}{8}\ =?$  

 $\frac{11}{20}-\frac{5}{20}\ =?_{ }$