Add & Subtract Fractions

What common denominator should be used?

• 18

• 20

• 7

• 21

What common denominator should be used?

• 10

• 20

• 5

• 9

What common denominator should be used?

• 8

• 20

• 12

• 7

Find the difference. Write the fraction in simplest form (reduce).

•  $\frac{2}{3}$  

•  $\frac{8}{9}$  

•  $\frac{5}{9}$  

•  $\frac{1}{3}$  

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What common denominator should be used?

• 24

• 18

• 12

• 8

Find the sum. Use the Giant One to rewrite the fractions with common denominators. Simplify (reduce) your final answer. 

•  $\frac{5}{6}$  

•  $\frac{2}{3}$  

•  $\frac{5}{18}$  

•  $\frac{1}{2}$  

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2