Discovery Education
Discovery Education: Web Math: Find the Least Common Multiple of Some Numbers
Use this site to find the Least Common Multiple (LCM) of any set of numbers. Simply type in your numbers, and the site will provide the answer complete with a full explanation.
Lawrence Hall of Science
The Math Page: Skill in Algebra: Multiplying Out: Distributive Rule
Understand topics related to the distributive property, including multiplying monomials by polynomials and binomials by binomials. See example problems solved, do problems for practice, and see answers to the student problems.
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems Number Theory
Practice using your graphing calculator for number theory problems, including prime factorization, greatest common factor, least common multiple, and scientific notation. If you get stumped or if you would like to check your work, then...
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.
CK-12 Foundation
Ck 12: Arithmetic: Least Common Multiple Grade 6
[Free Registration/Login may be required to access all resource tools.] Find the least common multiple of a given pair of numbers using lists.
CK-12 Foundation
Ck 12: Arithmetic: Least Common Multiple
[Free Registration/Login may be required to access all resource tools.] Find the least common multiple of a given pair of numbers using lists.
Other
Help With Fractions: Finding the Least Common Multiple
This website gives an excellent explanation of how to find the least common multiple. It offers two different methods and gives easy to follow step by step directions.
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.
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.
University of Vienna (Austria)
University of Vienna: Elementary Properties of Numbers
Quick interactive assessment which determines skill level on fraction equivalence, prime factorization, and common divisors/multiples.
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.
Math Planet
Math Planet: Finding the Least Common Multiple
Gain an understanding of the least common multiple by viewing an example and a video lesson.
Cool Math
Coolmath: Gcf's and Lcm's Greatest Common Factor
Understand how to find the greatest common factor.
Cool Math
Coolmath: Gcf's and Lcm's Common Factors
These prealgebra-arithmetic lesson explains greatest common factors (GCF's)and shows how to find them.
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.
Mathigon
Mathigon: Math Foundations: Divisibility and Prime: Least Common Multiples
This lesson features practical applications for finding the least common multiples.
Other
Greatest Common Factor Calculator
Free online calculator provides help with finding the greatest common factor.
Illustrative Mathematics
Illustrative Mathematics: 6.ns Multiples and Common Multiples
This task asks students to apply the concepts of multiples and common multiples in an abstract context. Aligns with 6.NS.B.4.
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.
Topmarks Online
Topmarks: Multiples and Factors
A multiple-choice game with two game modes. In the first, you need to identify the Lowest Common Multiple and in the second the Highest Common Factor. Questions increase in difficulty depending on accuracy.
Better Lesson
Better Lesson: Gcf and Lcm Quiz
Sixth graders show what they know about greatest common factor and east common multiple.
Better Lesson
Better Lesson: Gcf and Lcm Word Problems
Sixth graders differentiate between greatest common factor and least common multiple word problems.