Least Common Multiple Worksheet

Why is it important to understand how to find the least common multiple? This skill is essential when adding, subtracting, or comparing fractions. So how do you find the least common multiple, or LCM? As long as your students understand skip counting and their multiplication facts, finding the LCM should be relatively easy! To find the LCM of 2 different numbers, simply list out the multiples of each number and find 

The goal of this resource is to practice determining the least common multiple of a set of given numbers. Students must complete the math worksheet one section at a time and monitor their completion by coloring in the progress bar. There is a checking bar at the end to color in when they finish checking a section for accuracy. 

An answer key is included with your download to make grading fast and easy!  

Tips for Differentiation + Scaffolding 

In addition to independent student work time, use this worksheet as an activity for:

• Guided math groups
• Lesson warm-up
• Lesson wrap-up
• Fast finishers 
• Homework assignment
• Whole-class review (via smartboard)

To extend this resource, allow students to roll numbers using large dice or to use a random number generator online and find the LCM of their numbers. Students can also find the LCM of numbers that are important to them, such as their age and birth month. The page can also be modified to include more challenging number sets.  

For students who need a bit of support, invite them to reference previous assignments, anchor charts, or posters. Additionally, this activity can be completed in a 1-on-1 or small group setting.

🖨️ Easily Download & Print

Use the dropdown icon on the Download button to choose between the PDF or editable Google Slides version of this resource. If you are looking to assign this resource in Google Slides, there also is a digital version of this worksheet that students can complete. 

Because this resource includes an answer sheet, we recommend you print one copy of the entire file. Then, make photocopies of the blank worksheet for students to complete. 

To save paper, we suggest printing this 2-page worksheet double-sided. 

Turn this teaching resource into a sustainable activity by printing on cardstock and slipping it into a dry-erase sleeve. Students can record their answers with a whiteboard marker, then erase and reuse them. 

Additionally, project the worksheet onto a screen and work through it as a class by having students record their answers in their notebooks. 

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This resource was created by Lorin Davies, a teacher in Texas and Teach Starter Collaborator.