Math Worksheet · Grades 4–6
Greatest Common Factor and Least Common Multiple Worksheet
A printable math worksheet for grades 4-6 on the greatest common factor and least common multiple. Students find the GCF and LCM of number pairs, then solve four word problems. A complete answer key is included.
Subject
Math
Grades
Grades 4–6
Skill Focus
Greatest Common Factor and Least Common Multiple, place value
Lesson Length
20 minutes
Lesson Overview
About this worksheet
The greatest common factor (GCF) is the largest number that divides two numbers evenly, and the least common multiple (LCM) is the smallest number that is a multiple of both. This worksheet practices finding each and choosing the right one for a word problem.
The reference box on page 1 explains both terms with a worked GCF example and a worked LCM example. Section A on page 1 gives six problems, a mix of GCF and LCM. Section B on page 2 has four word problems that ask students to decide whether to find the GCF or the LCM.
Page 3 is a complete answer key that names the GCF or LCM for every item. The worksheet pairs well with the Factors and Multiples and Prime and Composite Numbers worksheets.
How to Use This Lesson
Read the reference box and compare the GCF and the LCM.
Find the GCF or LCM for the six items in Section A on page 1.
Solve the four word problems in Section B on page 2, choosing GCF or LCM.
Use the answer key on page 3 for self-check.
Pair with the Factors and Multiples Worksheet.
Printable Resource
A classroom-ready PDF with everything in one printable resource.
Full Member Resource · Printable PDF · 3 pages · Answer Key
Greatest Common Factor and Least Common Multiple Worksheet
A printable math worksheet for grades 4-6 on the greatest common factor and least common multiple. Students find the GCF and LCM of number pairs, then solve four word problems. A complete answer key is included.
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