Mangahigh
Mangahigh: Number: Least Common Multiple and Greatest Common Factor
This site provides students practice with the concept of least common multiples and greatest common factors. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to...
McGraw Hill
Glencoe: Self Check Quizzes 1 Greatest Common Factor
Use Glencoe's randomly generated self-checking quiz to test your knowledge of how to find the greatest common factor. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click...
University of Nottingham
Mars: Finding Factors and Multiples
This lesson is intended to help you to assess how well students are able to understand the meanings of the terms 'Greatest Common Factor' (GCF) and 'Least Common Multiple' (LCM). PowerPoint slides are provided for this lesson.
Mathigon
Mathigon: Math Foundations: Divisibility and Prime: Greatest Common Factors
This lesson focuses on the greatest common factors it poses real situations and asks students answer them and then it provides more information and more exercises.
Better Lesson
Better Lesson: Gcf and Lcm Project, Day 2
Sixth graders find the greatest common factor and least common multiple of numbers.
PBS
Pbs: Greatest Common Factor
In this video, learn how to find the greatest common factor of two numbers. Then, see how this can be used to solve problems with large numbers. In the accompanying classroom activity, students learn to find prime factors using factor...
Khan Academy
Khan Academy: Gcf & Lcm Word Problems
Solve word problems where you either need to find the GCF or LCM. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Calculator Soup
Calculator Soup: Greatest Common Factor Gcf Calculator
Calculate GCF, GCD, and HCF of a set of two or more numbers and see the work using factorization. An interactive calculator, explanations, and examples are included.
Better Lesson
Better Lesson: Multiples, Lcm, and Gcf
What are multiples? How do they compare with factors? Students work to answer these questions and develop an understanding of greatest common factor and least common multiple.
Better Lesson
Better Lesson: Greatest Common Factor & Least Common Multiple
Clearly understand the difference between factors and multiples builds a foundation for applications and problem solving using GCF and LCM.
CK-12 Foundation
Ck 12: Elem Math: Greatest Common Factor
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to identify the greatest common factor of two whole numbers that are one or two digits. Includes video demonstrating a...
Khan Academy
Khan Academy: Greatest Common Factor
Find the greatest common factor of 2 or 3 integers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Better Lesson
Better Lesson: Finding the Greatest Common Factor
For this lesson students can use different strategies to find the GCF of numbers less than 100.
Better Lesson
Better Lesson: Greatest Common Factor
Sixth graders will learn how to find the Greatest Common Factor of two or more numbers by using math manipulatives.
Cuemath
Cuemath: Highest Common Factor
Explore the world of Highest Common Factor or Greatest Common Factor (GCF) by going through its various aspects and properties. Find answers to questions like what is the highest common factor for a group of numbers, easy ways to...
Cool Math
Coolmath: Gcf's and Lcm's Common Multiples
These prealgebra-arithmetic lessons explain greatest common factors (GCF's) and least common multiples (LCM's) and show how to find them.
Wyzant
Wyzant: Factoring a Gcf From an Expression
The tutorial explains how to factor a greatest common factor from an expression. The resource includes a lesson with examples, practice problems, and an expression-factoring calculator.
Wyzant
Wyzant: Finding a Gcf
In this lesson from WyzAnt, students learn how to find the greatest common factor (GCF) for numbers and expressions. There are practice problems and a GCF calculator for assistance.
Wyzant
Wyzant: Factoring a Gcf From an Expression
This tutorial demonstrates how to factor the GCF out of a polynomial expression. An online worksheet is provided for extra practice.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Greatest Common Factor
Find a quick, concise explanation of how to find the greatest common factor. Examples are given and clearly explained.
Quia
Ixl Learning: Greatest Common Factor
Brush up on your math skills relating to the greatest common factor then try some practice problems to test your understanding.
Shmoop University
Shmoop: Basic Operations: Lcm & Gcf
Students learn about the least common multiple and the greatest common factor. The resource consists of notes, step-by-step examples, and practice problems with solutions.
Free Math Help
Free Math Help: Greatest Common Factor
The lesson investigates the greatest common factor. Explanations and sample exercises are provided.
Wyzant
Wyzant: Factoring a Gcf From an Expression
Students review factoring a greatest common factor from an expression. The handout consists of an example and answer sheet.