Curated OER
Make a Factor Tree
In this factoring worksheet, students solve 9 problems in which a two or three digit number is factored using a factor tree. Each number is in its own box. There are no examples.
Curated OER
LCM of 3 Numbers: Factor Trees
In this lowest common multiples learning exercise, students create factor trees to find the lowest common multiple of 3 numbers. Students complete 4 problems.
Curated OER
Factor Trees
Students practice factor trees. They use Paint in Microsoft Word to create factor trees. After completion, they use a calculator to check their answers. In addition, they visit websites to reinforce the information.
Curated OER
The Generation of Fractions
Pupils explore the process of reducing fractions to simplest form by using a multiples grid. In this simplest form lesson, students pull different fractions out of a bag and then consult their grid to discover all the multiples that...
Curated OER
Super Factors
Students complete activity pages. In this factors instructional activity, students practice finding the factors of numbers. They discuss prime factors and prime factorization and learn how to complete a factor tree.
Curated OER
Greatest Common Factor: Reteach
In this greatest common factor worksheet, students review the different ways to find the greatest common factor for numbers including listing all the factors and finding prime factorization with factor trees. Students then list the...
Scholastic
Study Jams! Greatest Common Factor
When one method isn't enough to teach GCF, try two! This interactive webpage introduces factors and the prime factor tree to find the greatest common factor of two numbers. After the lesson, have learners click to try the two examples...
Curated OER
Introducing the Concept Prime Factors
Fifth graders identify the prime factorization for 48 using different sets of factors. They find the prime factorization for 60.
Curated OER
Greatest Common Factor
In this GCF worksheet, students fill in missing numbers in factor trees and write the prime factorization to find the greatest common factor. Worksheet includes links to answers and additional worksheets.
Curated OER
Factors Worksheet
In this listing factors worksheet, students examine 30 math problems that require them to list the factors of 1-digit and 2-digit numbers.
Cuemath
Cuemath: Prime Factorization
In this lesson, you will be learning prime factorization to solve various mathematical problems followed by solved examples and practice questions.
Scholastic
Scholastic: Study Jams! Math: Multiplication & Division: Prime Factorization
This site provides great practice on the concept of prime factorization. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice their...
Quia
Ixl Learning: Prime Factorization
Brush up on your math skills relating to prime factorization then try some practice problems to test your understanding.
Elias Saab
Math Drills: Prime Factorization Quiz
This site is an interactive quiz which provides students with a prime factorization problem. Students input their solution and have the program evaluate it. Hints are available if the student needs them, and explanations are provided...
Homeschool Math
Homeschool Math: Prime Factorization
This site contains a free lesson on Prime Factorization in which students learn by doing practice problems.
Homeschool Math
Homeschool Math: Prime Factorization of Three Digit Numbers
This lesson shows examples of how to get started with the prime factorization of three-digit or larger numbers, using a factor tree. includes numerous practice exercises.
ClassFlow
Class Flow: Working With Prime and Composite Numbers
[Free Registration/Login Required] This flipchart allows students to practice working with prime and composite numbers. Students learn how to do prime factorization.
Shodor Education Foundation
Shodor Interactivate: Factorize
This Shodor site gives a brief explanation of factorization, and it allows you "to find all of the factorizations of a given number and then draw the product as the area of a rectangle on a grid."
Cool Math
Coolmath: Pre Algebra: Prime Factorizations
In this tutorial, students learn how to do prime factorization by a few different methods, including factor trees and factor stacks. The exercises work their way up from 2-digit numbers up to 5 digits. Includes practice problems.
University of Waterloo (Canada)
Wired Math: Primes and Prime Factors [Pdf]
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.