Adding and Subtracting Fractions with Unlike Denominators

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction

• Rewrite the fractions in the simplest form. 

• Find a common denominator. 

• Make each fraction into an improper faction. 

Aden is helping his dad paint his house. They mixed 5/9 gallons of white paint and 1/6 gallons of blue paint. How many gallons was the mixture in all?

• 6/18 gallons

• 13/18 gallons

• 4/5 gallons

• 1/6 gallons

Stacy used 1/4 cup of sugar and 2/3 cup of flour to bake a cupcakes. How much more flour did Stacy use than sugar?

• 11/12 cup

• 10/12 cup

• 6/12 cup

• 5/12 cup

Add 2/3 + 5/12=?

• 7/12

• 1 1/12

• 11/12

8/9 - 1/3 = 

• 7/6

• 5/9

• 2/3

• 8/27

4/5 - 1/20 = 

• 0

• 20/15

• 3/15

• 15/20

• 1/2

• 5/8

• 3/4

• 7/8

How do you find the common denominator when adding fractions with unlike denominators?

• By multiplying the denominators together

• By finding the greatest common factor

• By finding the least common multiple

• By adding the denominators together

The bottom number of a fraction is called the ______________

3/4 - 2/10

• 11/20

• 9/10

• 11/24

• 9/4