Equivalent Fractions
Design Guide
Designers for Learning - Adult Learning Zone
Table of Contents
Learner Audience / Primary Users
College & Career Readiness Standards (CCRS) Alignment
Instructional Strategies and Activities
Presentation / Modeling / Demonstration
Part 3: Supplementary Resources & References
Part 1: Lesson Description
Equivalent Fractions
Comparing and ordering fractions with different denominators.
Abstract
The following math lesson focuses on developing a deeper understanding of the value of fractions and allows the students to compare and order fractions while making decisions in a shopping experience. Learners will be better prepared to perform basic operations (+,-,x,/) once they have completed this module.
Learner Audience / Primary Users
Adult learners preparing for College Readiness Exams
Educational Use
- Curriculum / Instruction
Language
English
Material Type
- Instructional Material
- Interactive
Keywords
- Designers for Learning
- Adult Education
- Fractions
Time Required for Lesson
30 minutes
Targeted Skills
Key skills covered in this lesson include:
- Comparing fractions of prices
- Comparing fractions of time
Learning Objectives
By the end of this lesson, the learner should be able to:
- Learners will be able to order fractions from least to greatest with 80% or better success. (4.NF.2)
- Learners will be able to compare fractions by creating similar denominators or numerators and choosing which fraction is greater with 80% or better success. (4.NF.1)
- Learners will apply their understanding of fractions by solving problems deciding which purchase is a better deal with a success rate of 80% or better.
College & Career Readiness Standards (CCRS) Alignment
- Level: Adult Education
- Grade Level: CCRS Grade Level C
- Subject: Mathematics
- Domain or Strand:
- Domain: Numbers and Operations
- Strand: Fractions
- Standard Description:
- Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions. (4.NF.1)
- Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with symbols >, =, or
Prior Knowledge
Learners should know that a fraction represents part of a whole and they should be able to draw a representation of a fraction.
Required Resources
- Pencil
- Paper
- Lesson Plan
- Guided Learning Printable Page
- Printable Quiz
- Computer if you choose interactive activity
- Internet connection
Lesson Author & License
- Lesson Author: Lisa Ramsey
- License: Creative Commons CC BY 4.0 license
Part 2: Lesson
Instructional Strategies and Activities
Warm-Up
Time: 5 minutes
Learners will begin by reviewing fractions and shading fraction ‘pies’ to compare fractions of the same denomination.
Introduction
Time: 5 minutes
Compare ½ pies and ⅓ pies from the warm up examples. Not all fractions have the same denominator and this makes it harder to compare fractions. In order to compare fractions accurately, we need to match fractions with the same denominators. This process can be shown by making a couple of changes to how we split the fractions.
Presentation / Modeling / Demonstration
Time: 10 minutes
Create equivalent fractions by multiplying the slices.
For instance:
¼ can be multiplied by 3/3 to create 3/12.
This allows us to compare it to ⅙ by multiplying the fraction by 2/2 to create 2/12.
We have not changed the portion of the rectangle shaded, we have just divided it into the same number of segments to make it easier to compare. If we look at the two fractions, we now see that 3/12 is more than 2/12.
2/12 is ‘equivalent’ to ⅙ and 3/12 is ‘equivalent’ to ¼. Equivalent fractions are equal in value to the original fraction.
This means that ⅙ is less than ¼.
Guided Practice
Time: 10 minutes
Guided Practice Worksheet
Learners will complete the worksheet using similar examples as above by finding equivalent fractions and comparing fractions with the same denominator.
Checking Inventory
Before we do some shopping of our own, let’s check and make sure we have our inventory straight.
1.Name an equivalent fraction for 3/4.
First – shade ¾.
Next – Choose a number that is a multiple of 4. We will choose 12.
What do you need to multiply 4 by to get the answer of 12? ____
Multiply the numerator by the same number. The numerator of ¾ is the number 3.
3 x ___ = ____
Shade your answer in the boxes below.
Now compare your shaded group here with ¾ above. They should be the same amount. They are equivalent.
2.Find an equivalent fraction for 1/6. Draw diagrams below if you need them.
3.Find an equivalent fraction for 1/3. Draw diagrams below if you need them.
4.Find an equivalent fraction for 1/5. Draw diagrams below if you need them.
5.Compare the fractions 1/3 and 1/5. Change them both to equivalent fractions with the same denominator. Which fraction is a larger amount? Draw diagrams below if you need them.
Evaluation
Time: 5 minutes
Learners will complete quiz with 80% or better success.
Equivalent Fraction Quiz
Name two equivalent fractions for the fractions given below.
1.2/3
2.1/6
3.4/5
4.3/7
5.1/4
Compare the fractions below by using the symbols (, or =).
6.1/4 ____ 2/3
7.1/2 ____ 3/6
8.2/5 ____ 1/10
9.1/3 ____ 3/12
10.1/8 ____ 1/4
Application
Time: 10 minutes
“Is It a Deal???”
Learners will complete the worksheet comparing sale items by the fraction of the discount. Learners will write “Deal” across problems that are a deal and draw a large ‘x’ over problems that are not a deal.
Is It a Deal???
Look at the objects below and compare sale prices. Write “Deal” across the fraction that is the largest discount. Write an ‘x’ over the fraction that is smaller.
1.Armchair deal
Store A – 1/4 off Store B – 1/3 off
2.Shoes Deal
Store A – 1/5 off Store B – 1/2 off
3.Oil Change Deal
Store A – 1/6 off Store B – 2/5 off
4.Pizza Deal
Store A – 3/8 off Store B – 2/5 off
5.Shirt Deal
Store A – 2/3 off Store B – 5/6 off
Key Terms and Concepts
Equivalent fractions - fractions that have the same value but do not have the same numerator and denominator.
Part 3: Supplementary Resources & References
Supplementary Resources
Printable Worksheets from lesson - separate attachment
For further practice:
Khan Academy - Equivalent Fractions https://youtu.be/U2ovEuEUxXQ
Math is Fun - Equivalent Fractions https://www.mathsisfun.com/equivalent_fractions.html
References
Help With Fractions. 2003. Understanding Equivalent Fractions. Retrieved from
http://www.helpwithfractions.com/math-homework-helper/equivalent-fractions.
Pimentel, Susan. (2013). College and Career Readiness Standards for Adult Education.
MPR Associates, Inc. http://lincs.ed.gov/publications/pdf/CCRStandardsAdultEd.pdf.
Attribution Statements
Content (clipart) created by Pixabay for Equivalent Fractions,
originally published at pixabay.com under a Creative Commons CC0 license.
This course content is offered by Designers for Learning under a CC Attribution license.
Content in this course can be considered under this license unless otherwise noted. Page
(Design Guide effective September 12, 2016)