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Interactive
Curated OER

Least Common Multiple or Least Common Denominator

For Students 5th - 6th
Fifth and sixth graders solve 12 math problems by finding the least common multiple or least common denominator. They type the answer into the text box.
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Worksheet
Curated OER

Least Common Multiple

For Students 6th - 9th
Give students detailed instructions on how to find the Least Common Multiple as well as practice with this thorough introductory worksheet. Instructions for this worksheet include an explanation of both guess and check as well as prime...
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Interactive
Online Math Learning

Word Problems That Use GFC or LCM

For Students 4th - 6th
This is a webpage that contains five word problems requiring learners to find the least common multiple or least common denominator.
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Lesson Plan
EngageNY

Least Common Multiple and Greatest Common Factor

For Students 6th Standards
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...
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Interactive
Curated OER

Adding and Subtracting Fractions (With Unlike Denominators)

For Students 5th - 6th
In this math worksheet, students subtract and add fractions with unlike denominators. Students solve the problem in steps. They are given examples of how to solve the problems.
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Worksheet
Curated OER

Least Common Multiple

For Students 3rd - 6th
Given ten pairs of numbers, mathematicians find the least common multiple for each. The numbers span from 2-30, and are generally introductory for this skill (no curve balls). Encourage learners to write out multiples alongside the...
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Assessment
PBS

Working with Common Denominators: Assessments

For Students 4th - 6th Standards
Now that the practice is over, see if young mathematicians can utilize their new skills on finding common denominators and adding fractions. The assessment contains one map challenge and follows with skills practice. 
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Lesson Plan
Illustrative Mathematics

Multiples and Common Multiples

For Teachers 6th - 7th Standards
Learners are asked to find multiples and common multiples of two numbers. They must take their findings and find a pattern between the numbers and explain their reasoning. Use this resource with The Florist Shop activity in this series...
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Worksheet
Curated OER

Least Common Multiples

For Students 6th - 8th
In this math worksheet, students 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...
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Interactive
2
2
Scholastic

Study Jams! Add & Subtract with Common Denominators

For Students 3rd - 6th Standards
RJ and Zoey are at camp and need to get back to the mess hall for lunch, but they don't know how far they have to walk. Help them figure out the distance while teaching young mathematicians how to add and subtract fractions with this...
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Worksheet
PBS

Working with Common Denominators: Activities and Supplemental Materials

For Students 4th - 6th Standards
Enjoy these straightforward and simple learning exercise pages that practice with different denominators. The practice starts simple with adding fractions together and then works on a recipe that needs to be tripled. 
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Worksheet
K-5 Math Teaching Resources

Adding Mixed Numbers (Unlike Denominators)

For Students 3rd - 6th Standards
Mix things things up in your elementary math class with a series of problem-solving exercises. Presented with a series of mixed number word problems, young mathematicians are asked to solve them by using either visual fraction models or...
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Interactive
1
1
Scholastic

Study Jams! Compare Fractions & Mixed Numbers

For Students 3rd - 6th Standards
Follow along with RJ from the Study Jams! crew as he walks step-by-step through the process for comparing fractions with unlike denominators. Starting with finding the least common denominator, the presentation goes on to demonstrate how...
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Worksheet
Curriculum Corner

Fraction Brochures

For Students 4th - 6th Standards
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...
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Lesson Plan
Illustrative Mathematics

The Florist Shop

For Teachers 6th - 7th Standards
A real-world approach to common multiples asks learners to find different groups of flowers based on their multiples. Useable as a class activity or independent exercise, they will have to organize their thoughts to explain the totals of...
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Lesson Plan
Curated OER

Common Multiples

For Teachers 6th - 8th
Students explore the concept of common multiples. In this common multiple instructional activity, students find the lowest common multiple of two numbers.
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PPT
1
1
Curated OER

Fraction - Subtracting Unlike Denominators

For Teachers 4th - 6th
These presentations by Monica Yuskaitis are particularly good. In this one, she shows viewers how to deal with subtracting fractions that have unlike denominator, no small task! This is a tricky process, and this PowerPoint takes young...
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Interactive
CK-12 Foundation

Fraction Ordering with Lowest Common Denominators: Test Your Strength

For Students 6th Standards
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...
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Worksheet
Curated OER

Lowest Common Multiple

For Students 4th - 8th
In this lowest common multiple worksheet, students find the LCM of 2 digit numbers that don't exceed the number 20. Students complete 10 problems.
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Lesson Plan
Curated OER

Finding the LCM

For Teachers 4th - 8th
Students explore the concept of finding the least common multiple of two numbers. In this least common multiple lesson, students find the least common multiple of two numbers.
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Interactive
Curated OER

Relating GCF and LCM for Grade Six

For Students 6th
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.
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Worksheet
Curated OER

Finding the Least Common Multiple

For Students 6th
In this finding the least common multiple activity, 6th graders use two methods, a list of multiples or prime factorization, to find least common multiples.
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Lesson Plan
Curated OER

Playing the LCM Game

For Teachers 5th - 8th
Students practice finding the least common multiple of two numbers.  In this practice finding the least common multiple of two numbers lesson, students play head-to-head against their classmates.  Students play a version of 'slap jack'...
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Worksheet
Curated OER

Math Quiz: Least Common Multiple

For Students 6th
In this math quiz:  least common multiple worksheet, 6th graders find the LCM for 8 pairs of numbers, then answer 3 multiple choice word problems.

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