Adding and Subtracting Fractions with Unlike Denominators

 $\frac{2}{3},\frac{5}{12}$  

Find the lowest common denominator and make the equivalent fractions 

 $\frac{5}{6}+\frac{7}{8}$  

 $2\ \frac{2}{3}-1\ \frac{2}{5}$  

Find the difference

 $7\ -1\frac{3}{7}$  

Samuel walks in the Labor Day parade. He walks  $3\frac{1}{4}$  miles along the parade route and  $2\frac{5}{6}$  miles home. How many miles does Samuel walk? 

•  $\frac{5}{10}$  mile

•  $5\frac{1}{12}$  mile

•  $5\frac{11}{12}$  mile

•  $6\frac{1}{12}$  mile

A gardener has a container with  $6\frac{1}{5}$  ounces of liquid plant fertilizer. On Sunday, the gardener uses  $2\frac{1}{2}$  ounces on a flower garden. How many ounces of liquid plant fertilizer are left?

•  $3\frac{7}{10}$  ounces

•  $4\frac{7}{10}$  ounces

•  $6\frac{7}{10}$  ounces

•  $8\frac{7}{10}$  ounces

Aaron is practicing for a triathlon. On Sunday, he bikes  $12\ \frac{5}{8}$  miles and swims  $5\ \frac{2}{3}$  miles. On Monday, he runs  $6\ \frac{3}{8}$   miles. How many total miles does Aaron cover on the two days? 

•  $23\ \frac{1}{6}$  

•  $24\ \frac{2}{3}$  

•  $24\ \frac{7}{12}$  

•  $25\ \frac{7}{12}$  

Mrs. Friedmon baked a walnut cake for her class. The pictures above show how much cake she brought to school and how much she had left at the end of the day.

Which fraction represents the difference between the amounts of cake Mrs. Friedmon had before school and after school?

• $\frac{5}{8}$

• $1\ \frac{1}{2}$

• $1\ \frac{5}{8}$

• $2\ \frac{1}{2}$