Lesson 14 Represent Division of Whole Numbers by Unit Fractions

    • Let’s solve problems involving division of a unit fraction by a whole number.

Warm-up Number Talk: Increasing Quotients

Find the value of each expression mentally.

Activity 1 Notice Patterns

Problem 1

Set A: Find the value that makes each equation true. Draw a diagram if it is helpful. What patterns do you notice?

Problem 2

Set B: Find the value that makes each equation true. Draw a diagram if it is helpful. What patterns do you notice?

Problem 3

What is the same about problem set A and B? What is different?

Activity 2 Match the Situation to the Expression

Photograph

Match each problem to an expression that represents the problem. Some expressions will not have a match. Be prepared to explain your reasoning.

  1. One serving of popcorn is cup of kernels. There are 3 cups of kernels in the bowl. How many servings are in the bowl?

  2. One serving of orange juice is liter. The container of juice holds 2 liters. How many servings are in the container?

  3. One serving of granola is cup. The bag of granola holds 5 cups. How many servings are in the bag?

  4. Find the value of each expression.

Practice Problem

Problem 1

Find the value of each expression.