Adding and subtracting fractions of pizzas, pies, and cakes

The  exercise appears under the 4th Grade Math Mission. This exercise uses real-life contextual problems to connect fractions and division.

Types of Problems
There are two types of problems in this exercise:


 * 1) Find the total and fraction eaten: This problem provides a situation where some people have eaten a pizza, pie or cake. The student is told how much each ate and how many pieces remain, and they are asked to find the fraction that was eaten.Uftdppac1.png
 * 2) Find the fraction eaten given the total: This problem provides a situation where a person has eaten some number of pieces of pizza, pie or cake. The student is asked to write the fraction that the person has eaten.Uftdppac2.png

Strategies
Knowledge of fractions as a ratio of part to whole can make these problems clear.
 * 1) The fractions do not need to be reduced to be awarded a correct answer.

Real-life applications

 * 1) These problems are written as a real-life application, and they can be used in situations other than eating where some of a total of things are completed.