Sub Fractions

 $\frac{4}{\ 5\ }\ -\ \frac{2}{5}\ =$  

•  $\frac{2}{10}$  

•  $\frac{2}{0}$  

•  $\frac{2}{5}$  

 $\frac{7}{8}-\frac{3}{8}\ =$  

•  $\frac{4}{1}$  

•  $\frac{4}{6}$  

•  $\frac{1}{2}$  

 $\frac{11}{12}-\frac{4}{12}=$  

•  $\frac{5}{12}$  

•  $\frac{6}{12}$  

•  $\frac{7}{12}$  

 $\frac{4}{5}-?\ =\frac{1}{5}$  

•  $\frac{2}{5}$  

•  $\frac{3}{5}$  

•  $\frac{5}{5}$  

 $\frac{9}{10}-\frac{5}{10}=$  

•  $\frac{4}{10}or\frac{2}{5}$  

•  $\frac{4}{8}$  

•  $\frac{4}{10}\ or\ \frac{2}{10}$  

What must you do first in order to add or subtract fractions with unlike denominators?

• add the numerators

• add the denominators

• find a common denominator

• find a common numerator

17/20 - 6/20

• 11

• 23/20

• 11/20

• 11/0

7/13 - 2/13

• 9/13

• 5/13

• 14/13

• 4/13

Subtract and simplify:
19/25 - 9/25

• 10/25

• 2/5

• 3/5

• 9/25

• 1/6

• 1

• 1/0

• 1/12