Adding Fractions with Unlike Denominators

Free to teach as-is — the teacher guide, student handout, and slides are included.

Free — we'll email you an access link. Google Docs format.

Objective

I can add fractions with unlike denominators by finding a common denominator and combining the numerators.

Part 1 of 3

Warm-up video

Math with Mr. J · 5:42Vetted channel

We don't generate video — this one is by Math with Mr. J on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

Part 2 of 3

Practice

7 questions

1

What is a common denominator, and why is it necessary when adding fractions with unlike denominators?

2

Find the least common multiple of 5 and 15. What would be the common denominator if you were to add ⅖ and ⅗?

Part 3 of 3

Exit ticket

Quick comprehension check

Add the fractions ⅗ and ⅞ by finding a common denominator. Show all your work, including how you found the common denominator and the equivalent fractions. Add the fractions ¼ and ⅖ by finding a common denominator. Show all your work, including how you found the common denominator and the equivalent fractions.

Sample answer included in the free materials

Get the materials

Teacher guide, student handout, and slides — free, in Google Docs format

  • Teacher Guide

    Complete lesson plan with answer keys and alternate activities

  • Student Handout

    Printable worksheet

  • Slides

    Ready to present

We'll ask for your email to send your access link — nothing else.

Teaching a group at a different level?

Where are your students right now? We'll rebuild this lesson to match — including the teacher guide, student handout, and slides, saved to your Google Drive.

Adapt This Lesson