What is the first step in adding mixed numbers with unlike denominators?

Separate the whole number parts from the fraction parts.

Why is it important to find a common denominator when adding fractions?

To add fractions, they need to represent parts of the same whole, which is achieved by having a common denominator.

Name: Adding Mixed Numbers with Different Denominators
Author: Insta~Lesson

9th Grade · Math · 30 min

I can add mixed numbers with unlike denominators by finding a common denominator.

1
To add mixed numbers with unlike denominators, you can separate the whole number parts from the fraction parts.
2
To add fractions, you need to have the same denominator, and the least common multiple can be used to find this.
3
After adding the fractions, you may need to simplify the fraction to arrive at the final answer.

We would love to help you present Insta~Lesson to your colleagues and administrators. Here are a few resources you can use:

A simple one-pager you can use to share Insta~Lesson.

Learn how Insta~Lesson makes life easier for teachers. This is a great resource to share at a staff meeting or PD!

Learn more about Insta~Lesson's dedicated supports for partner schools.