Curated OER
Least Common Multiple
In this least common multiple worksheet, students write numbers as a product of primes to determine the least common multiple. Explanations and examples are provided. This two-page worksheet contains ten problems.
Curated OER
Solving Rational Equations
In this rational equation worksheet, students solve rational expressions by finding the LCM. There are 18 problems on this two-page worksheet.
Curated OER
Finding LCM
In this LCM learning exercise, students read several paragraphs on finding LCM in various situations, then solve 25 problems.
University of Regina (Canada)
University of Regina: Math Central: Greatest Common Divisor and Least Common Multiple
Learn about the greatest common divisor, the least common multiple, and the Euclidean Algorithm. This resource gives a description of each of these concepts, accompanied by several examples.
PBS
Pbs Learning Media: Finding the Common Beat
The CyberSquad figures out how to represent the patterns of music played by four instruments in this Cyberchase video segment.
McGraw Hill
Glencoe: Self Check Chapter Test Fractions and Decimals
Students are assessed on fractions and decimals. Topics include greatest common factor, improper fractions, and fractions as decimals. The self-checking test includes hints and solutions.
Math Drills
Math Drills: Number Sense Worksheets
Download these free worksheets to sharpen your number sense skills. Sheets focus on roman numerals, scientific notation, counting, expanded form, exponents, factoring, roots, and rounding.
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.
AAA Math
Aaa Math: Least Common Multiple
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.
George Mason University
Margo Mankus: Investigating Lcm and Gcf Using Rods
This lesson plan is for an activity using rods (Cuisenaire Bars) to help learners understand the concept of factors, in particular the LCM and GCF of two numbers.
Texas Instruments
Texas Instruments: Gcd and Lcm
In this activity students use the Computer Algebra System CAS tool to compute greatest common divisor (GCD) and least common multiple (LCM) of numbers and expressions.
Texas Instruments
Texas Instruments: Oliver's Method
Students discover a relationship between the Greatest Common Factor (GCF) and the Least Common Multiple (LCM) of two numbers. Students will find and justify the relationship that the product of two numbers is equal to the product of the...
Elias Saab
Math Drills: Lcm and Gcd Quiz
An interactive quiz which provides students with two numbers and asks them to find either the Least Common Multiple or the Greatest Common Divisor between them. Students input their solution and have the program evaluate it. Hints are...
Scholastic
Scholastic: Study Jams! Math: Fractions: Least Common Multiples
Complete a step by step problem to solve for the least common multiple.
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...
CK-12 Foundation
Ck 12: Elem Math: Subtracting Fractions With Different Denominators
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must find the least common denominator of two fractions in order to subtract one from the other. Includes video demonstrating a...
CK-12 Foundation
Ck 12: Elem Math: Fractions With Different Denominators 3 Numbers
[Free Registration/Login may be required to access all resource tools.] In this learning module, students add and subtract three fractions with different denominators. Includes video demonstrating a sample problem [2:41] and a set of...
Math Is Fun
Math Is Fun: Least Common Multiple Tool
A simple tool that you can use to find the least common multiple (LCM) of two or three numbers.
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.
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: 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: Elem Math: Finding Least Common Multiples Lcm
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems involving least common multiples.
CK-12 Foundation
Ck 12: Elem Math: Finding the Least Common Denominator
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must find the least common denominator for the fractions they are presented with. Includes video demonstrating a sample problem...
CK-12 Foundation
Ck 12: Elem Math: Ordering Fractions With Different Denominators
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to compare fractions with different denominators and put them in order. Includes video demonstrating a sample problem...