Activity
Cool Math

Coolmath: Gcf's and Lcm's Common Multiples

For Students 5th - 8th Standards
These prealgebra-arithmetic lessons explain greatest common factors (GCF's) and least common multiples (LCM's) and show how to find them.
Handout
Cuemath

Cuemath: Highest Common Factor

For Students 9th - 10th Standards
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...
Article
Cuemath

Cuemath: Least Common Multiple

For Students 5th - 8th Standards
Learn about the properties of Least Common Multiples (LCM) and the three methods to find the LCM. Included are solved examples and interactive problems for review.
Activity
Other

Help With Fractions: Finding the Least Common Multiple

For Students 3rd - 8th Standards
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.
Unit Plan
Scholastic

Scholastic: Study Jams! Math: Multiplication and Division: Multiples

For Students 3rd - 6th
This site provides great practice on the concept of multiples. 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 knowledge by...
Lesson Plan
George Mason University

Margo Mankus: Investigating Lcm and Gcf Using Rods

For Teachers 9th - 10th Standards
This lesson plan is for an activity using rods (Cuisenaire Bars) to help students understand the concept of factors, in particular the LCM and GCF of two numbers.
Activity
Purple Math

Purplemath: Lcm & Gcf

For Students 9th - 10th Standards
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.
Unit Plan
Mangahigh

Mangahigh: Number: Least Common Multiple and Greatest Common Factor

For Students 4th - 7th Standards
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...
Interactive
AAA Math

Aaa Math: Least Common Multiple

For Students 3rd - 8th Standards
This tutorial offers an explanation of least common multiples, practice finding them and a game to play. There is a lot of information available at this location.
Unknown Type
University of Waterloo (Canada)

Wired Math: Primes and Prime Factors [Pdf]

For Students 3rd - 8th Standards
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.
Activity
Discovery Education

Discovery Education: Web Math: Find the Least Common Multiple of Some Numbers

For Students 3rd - 8th Standards
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.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 6.ns Adding Multiples

For Teachers 6th Standards
This task will provide insight to teachers on students' level of understanding when reasoning about a problem. The task asks students to examine whether the sum of two numbers that are multiples of 6 produces another multiple of 6....
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Picturing Factors in Different Orders

For Teachers 5th - 8th
The purpose of this task is to help students picture the multiplicative structure of the number 30 in different ways. Some of this structure is easier to communicate using grouping symbols, as it is easier to interpret...
Professional Doc
Louisiana Department of Education

Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide Multip, Div With Units of 0, 1, 6 9, and Multiples of 10

For Students 3rd Standards
A guide to support parents as they work with their students in multiplication and division with units of 0, 1, 6-9, and multiples of 10.
Unknown Type
University of Vienna (Austria)

University of Vienna: Pulling Common Factors Out

For Students 9th - 10th
Multiple choice assessment which tests knowledge of "simple" factoring (greatest common factor only), given varying degrees of polynomials.
Lesson Plan
Better Lesson

Better Lesson: Multiples, Lcm, and Gcf

For Teachers 6th Standards
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.
Unit Plan
Khan Academy

Khan Academy: Gcf & Lcm Word Problems

For Students 5th - 7th Standards
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.
Interactive
Topmarks Online

Topmarks: Multiples and Factors

For Students 4th - 6th Standards
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.
Unit Plan
Khan Academy

Khan Academy: Greatest Common Factor

For Students 5th - 7th Standards
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.
Unknown Type
Khan Academy

Khan Academy: Factors & Divisibility

For Students 9th - 10th Standards
Students practice multiple-choice problems with factors and divisibility.
Unknown Type
Khan Academy

Khan Academy: Least Common Multiple

For Students 6th - 8th
In this exercise, students practice finding least common multiple. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Activity
Cool Math

Coolmath: Gcf's and Lcm's Least Common Multiple

For Students 7th - 9th
These prealgebra-arithmetic lessons explains greatest common factors (GCF's) and least common multiples (LCM's) and shows how to find them.
eBook
Math Planet

Math Planet: Finding the Least Common Multiple

For Students 6th - 8th Standards
Gain an understanding of the least common multiple by viewing an example and a video lesson.
Unknown Type
That Quiz

That Quiz: Factores

For Students 9th - 10th Standards
Interactive practice tests dealing with factors. Students will practice the prime factors, greatest common factor and least common multiple.

Other popular searches