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Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Greatest Common Factor 2
Twenty-four problems present a variety of problems working with finding the greatest common factor and finding prime factorizations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of...
Math Planet
Math Planet: Pre Algebra: Finding the Greatest Common Factor
Gain an understanding of how to find the greatest common factor by viewing examples and a video lesson. [1:47]
Other
Help With Fractions: The Greatest Common Factor
Two different methods of finding the greatest common factor are explained at this one page website. It is very easy to follow the step by step directions.
Texas Instruments
Texas Instruments: Finding the Gcf
Students simplify fractions by dividing the numerator and denominator by the GCF (the greatest common factor). They check their work by using a calculator.
Discovery Education
Discovery Education: Web Math: Factoring Polynomials by Finding the Gcf
This WebMath online tool is useful for factoring polynomials by finding the greatest common factor. Simply plug the numbers in and you are on your way!
Better Lesson
Better Lesson: Finding the Greatest Common Factor
In this lesson students can use different strategies to find the GCF of numbers less than 100.
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...
CK-12 Foundation
Ck 12: Arithmetic: Greatest Common Factor Using Factor Trees
[Free Registration/Login may be required to access all resource tools.] Find the greatest common factor of a given numbers using factor trees.
CK-12 Foundation
Ck 12: Arithmetic: Greatest Common Factor Using Lists Grade 6
[Free Registration/Login may be required to access all resource tools.] Find the greatest common factor of a given number using lists.
CK-12 Foundation
Ck 12: Arithmetic: Greatest Common Factor Using Lists Grade 6
[Free Registration/Login may be required to access all resource tools.] Find the greatest common factor of a given number using lists.
Scholastic
Scholastic: Study Jams! Math: Fractions: Greatest Common Factor
Complete a step by step process to determine the greatest common factor.
Better Lesson
Better Lesson: Gcf and Lcm Project Gallery Walk
Sixth graders further their understanding of finding the greatest common factor and least common multiples.
Cool Math
Coolmath: Gcf's and Lcm's Greatest Common Factor
Understand how to find the greatest common factor.
Discovery Education
Discovery Education: Web Math: Greatest Common Factor
This WebMath site contains a tool for locating the greatest common factor. Simply plug in the numbers and you are on your way! Use it to check your answers.
Other
Greatest Common Factor Calculator
Free online calculator provides help with finding the greatest common factor.
McGraw Hill
Glencoe: Self Check Quizzes 2 Greatest Common Factor
Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of greatest common factors. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...
Purple Math
Purplemath: Lcm & Gcf
Purplemath shows an easy and orderly way to determine the GCF and LCM of any two numbers. Even large numbers won't be a challenge with this method.
Math.com
Math.com: Greatest Common Factor/practice Calculator
A page which generates number pairs and allows the user to find and enter the GCF. Keeps a running tally of correct/incorrect answers and has links to in depth review, if needed.
Soft Schools
Soft Schools: Greatest Common Factor Worksheet
Find the greatest common factor between two numbers. You may set the total number of problems per page, the minimum and maximum numbers, and an answer key is optional.
Texas Instruments
Texas Instruments: Greatest Common Factor
Students use a graphing calculator to find the Greatest Common Factor of two or more numbers.
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra: Gcf and Factoring by Grouping
Excellent tutorial on GCF of polynomials, including examples and step-by-step instruction on factoring.
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.
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.