CK-12 Foundation
Greatest Common Factor Using Factor Trees
Beginning with a description that sets the stage, learners are asked to break down the numbers 42 and 63 to find the greatest common denominator using factor trees. As they work through the factoring process, young mathematicians are...
EngageNY
Least Common Multiple and Greatest Common Factor
Find the common denominator between prime factors, factor trees, and the distributive property. Scholars learn to find the least common multiple and greatest common factor of pairs of numbers. They rotate through stations to connect...
Online Math Learning
Word Problems That Use GFC or LCM
This is a webpage that contains five word problems requiring learners to find the least common multiple or least common denominator.
CK-12 Foundation
Fraction Ordering with Lowest Common Denominators: Test Your Strength
Young mathematicians use a bell and hammer to see how high or low the puck goes. Then, they order the fractional values to demonstrate the greatest to lowest hit. Students then respond to several questions that require them to use...
Scholastic
Study Jams! Simplest Form
Make math simple with this step-by-step presentation on fractions in their simplest form. Multiple approaches are introduced including, most efficiently, the division of numerators and denominators by their greatest common factor. Work...
Curated OER
Add Fractions With Like Denominators (G)
In this adding fractions activity, students add fractions with common denominators, write answers as mixed numbers, and reduce to greatest common factor. Students solve 14 problems.
Curated OER
Relating GCF and LCM for Grade Six
In this relating GCF and LCM for Grade Six worksheet, 6th graders answer ten multiple choice questions about factors and multiples, with answers available onscreen.
Curated OER
Fractions in Simplest Form
For this fractions worksheet, 5th graders write the factors of 12 and 16, write the greatest common factor of 12 and 16, divide by the greatest common factor for 12/16 and write what the simplest form is of the fraction 12/16. Students...
Texas Instruments
Greatest Common Divisor and Least Common Multiple
Students solve problems using the GCD and LCM. In this algebra instructional activity, students factor and simplify equations using the greatest common and least common factors and multiples. They factor integers in pairs.
Curated OER
Add Fractions With Like Denominators (A)
In this mathematics worksheet, students solve a number of problems by adding the numerators of each and keeping the same denominator. Then they write the answer as a mixed number.
Curated OER
Paper Pool
Students explore ratio and proportion, GCF, and LCM. In this middle school mathematics instructional activity, students play an interactive Paper Pool game that provides an opportunity to increase their understanding or ratio,...
Curated OER
Finding the Greatest Common Factor
For this math worksheet, students learn to find the greatest common factor and simplify fractions. Students read the information and follow the step by step directions to find the GCF in 10 problems.
Curated OER
Factor Fun for Fifth Graders
Fifth graders explore common factors. In this factorization lesson, 5th graders discover the greatest common factor among two numbers in a game format. Students build on previous knowledge to determine the greatest common factor.
Curated OER
Fractions VI: Simplifying Fractions
This fractions PowerPoint defines and gives examples of factors and greatest common factors, then introduces the steps involved in simplifying a fraction. Plenty of guided practice is provided for each step.
Curated OER
Making the Connections
Use a Horton Chart to identify relationships between numbers and make equivalent fractions and decimals. Scholars change a fraction to find the greatest common factor, find percents, and make equivalent decimals.
Curated OER
Primes and Prime Factors
In this primes and prime factors worksheet, 8th graders solve 21 different problems to include identifying each number as prime, composite, or neither prime nor composite and listing all the primes less than 200. Then they complete each...
Curated OER
Least Common Multiples
In this math worksheet, learners find the least common multiple of sets of numbers. Students factor each number to their prime factorization. They use the primes to find the least common multiples. This is a worksheet generator, the...
Curated OER
Number Sense and Numeration: Multiples, Factors and Square Roots
A great resource for any math teacher covering multiples, factors or square roots; this worksheet walks young mathematicians through the logic behind factoring and square roots with a systematic set of problems which gradually increase...
Curriculum Corner
Fraction Brochures
Make fractions fun and interesting by using a brochure form. Young mathematicians practice and gain a better understanding of how to add and subtract fractions, simplify fractions, and find LCD (least common denominator). The resources...
Houghton Mifflin Harcourt
Unit 4 Math Vocabulary Cards (Grade 5)
Common denominators, factors, and rounding are a few of the terms in a set of flash cards designed to reinforce math vocabulary. Forty-two cards offer a bold-faced vocabulary word or a corresponding definition alongside an example with...
National Security Agency
Fraction Fever
This unit on fractions allows for upper-aged elementary learners to explore ways to find the greatest common factor and least common multiple of two numbers. Ultimately, young mathematicians will be able to identify equivalent fractions,...
Math Mammoth
GCF and Simplifying Fractions
For this math worksheet, students find the greatest common factor of 18 pairs of numbers. Given the prime factorization of pairs of numbers students find the greatest common factor. Students simplify fractions and rational expressions.
Curated OER
Substituting Fractions
Fun with fractions! Fourth graders practice substituting and reducing fractions. The problems contain blank spaces and become more challenging as the activity progresses. Use this as a building block in your fractions lesson.
Curated OER
Least Common Multiple
In this least common multiple learning exercise, learners write numbers as a product of primes to determine the least common multiple. Explanations and examples are provided. This two-page learning exercise contains ten problems.