Scholastic
Study Jams! Compare Fractions & Mixed Numbers
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...
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...
Illustrative Mathematics
The Florist Shop
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...
Curated OER
Fractions
In this LCD worksheet, students find the lowest common denominator in fraction problems that are also division problems. Students complete 3 problems.
Curated OER
Common Multiples
Students explore the concept of common multiples. In this common multiple instructional activity, students find the lowest common multiple of two numbers.
Curated OER
The 3 R's of Common Denominators
Third graders are shown an alternative method of determining the lowest common denominator of two or more unequal denominators. They complete a worksheet.
Curated OER
Fraction - Subtracting Unlike Denominators
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...
Curated OER
LCM: Variables and Exponents
In this algebra worksheet, students determine the least common multiple of variables with exponents. There are 10 questions and a provided workspace.
Curated OER
Finding Common Denominators to Subtract
Subtracting fractions with unlike denominators can be overwhelming, but in this task, 5th graders work systematically to break down the procedure through three questions. The first two questions ask for pictures to be drawn along with...
Illustrative Mathematics
Finding Common Denominators to Add
Finding common denominators is an important strategy when adding fractions with unlike denominators. In the first two questions in this three-question task, fifth graders are asked to combine fractions and draw a picture to show their...
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...
Curated OER
Lowest Common Multiple
For this lowest common multiple worksheet, students find the LCM of 2 digit numbers that don't exceed the number 20. Students complete 10 problems.
Curated OER
Least Common Multiple
For 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
Finding the LCM
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.
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
Finding the Least Common Multiple
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.
Curated OER
Playing the LCM Game
Students practice finding the least common multiple of two numbers. In this practice finding the least common multiple of two numbers instructional activity, students play head-to-head against their classmates. Students play a version...
Curated OER
Math Quiz: Least Common Multiple
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.
Curated OER
Word Problems Using the Lowest Common Multiple
In this word problems using the lowest common multiple instructional activity, 6th graders answer 10 multiple choice problems, with answers at the bottom on the screen.
Curated OER
Subtracting Fractions
In this subtracting fractions activity, students solve 18 different problems that include subtracting various types of fractions. First, they find the least common multiple of both numbers. Then, students rewrite the fractions as...
Curated OER
Fraction X - Adding Unlike Denominators
Adding fractions with unlike denominators is a difficult process to master. This fine presentation does a terrific job of leading young math whizzes through the steps necessary to perform this calculation. The slides have clear graphics,...
Curated OER
Common denominators
In this common denominators worksheet, pupils find common denominators for pairs of fractions. Students find common denominators for 4 pairs of fractions.
Curated OER
Finding The LCM
Students find the least common multiple. In this LCM lesson, students find the multiples of two numbers. They view which multiples are common between the two numbers and then find the smallest.
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.