Fractions Unlike Denominators

What do you need to have when adding unlike fractions?

• common denominator

• common numerator

• common numerator and denominator

A construction company is digging a pit to build the foundation of a house. At the end of the first day, the company had hauled away 1/6 of a truckload of dirt. On the second day, they hauled away 2/6 of a truckload. How many truckloads did they haul away in all?

• 13/15
• 1 7/12
• 1
• 9/15

• - 3/56
• 18/56
• - 4/15
• 29/56

1/4 + 3/8 =

• 5/8

• 3/8

• 4/12

• 4/8

4/8 + 1/3 =

• 5/11

• 4/8

• 13/24

• 4/11

1/18 + 5/6 = 

• 5/9

• 6/9

• 8/9

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. 

4/5 - 1/20 = 

• 0

• 20/15

• 3/15

• 15/20

What is 8/9 - 5/6?

• 1/18

• 3/4

• 6/7

• 10/12