# Lesson 5 — Activity 1: Working with Fractions with Like Denominators

#### Fractions are used in many daily activities and expressions. For example, you might say that it is half an hour until the bell rings, or that there are three quarters of a pizza left. These are both fractions. #### The following are all examples of proper fractions: #### The following are all examples of improper fractions: #### The following are all examples of mixed numbers: #### In order to add or subtract fractions, you must have a common denominator.

##### Check to see if you have a common denominator. In this case, the denominator is 8 in both fractions.Because we have a common denominator, we can add the numerators together and put them over the common denominator. The denominator stays the same. ##### This drawing shows how you would show the equation in a picture format. #### Over the weekend, Jon drank 4/5 of a bottle of soda and Kris drank 1/5 of a bottle. How much more soda did Jon drink than Kris? (Don't forget your statement.) #### For example, you want to double a recipe for chocolate chip cookies. The original recipe calls for 2  1/3 cups of flour.

##### To double the recipe, you would add: ##### #### To add mixed numbers with the same denominator: #### Add the whole numbers together. Add the numerators. The denominator stays the same. #### Find a number that can be divided into both the numerator and denominator. Divide, then repeat until the numerator and denominator cannot be divided further. #### When you get your answer, see if the fraction can be reduced and show a method to do this. 