Show students two pizzas, each representing a different fraction. Discuss the steps required to add the two unlike fractions. First, you must create a common denominator, and then you will be able to add the two fractions. Show students how to create a common denominator for the two fractions and how to add the fractions together. Practice solving a few problems as a class. Next, show students what to do if the fractions are mixed fractions involving a whole number. Tell students to ignore the whole number until the fractions have been given a common denominator, and then to add. Remind students that if their fraction creates a mixed number that the whole number is added to the whole numbers in the problem. Practice adding fractions with different denominators. Ask students to explain their thinking. Give students fractions in a story problem. Ask them which numbers they need to solve the given problem and ask them how to solve the story problem.