Add and subtract fractions within 1

Learning focus

In this lesson you will learn how to add and subtract fractions where the total is within 1.

This includes:

• two videos
• two worksheets

Created in partnership with Pearson.

Learn

We will start by remembering two skills we have used before:

A: Adding fractions with the same denominator

B: Finding equivalent fractions

Make sure you feel confident with these skills. We’re going to use them to find the solution to addition and subtraction problems where the fractions have different denominators.

Throughout these activities and the independent practice questions, if you want to draw your own diagrams to begin with, that is fine. The idea is that once you have worked with the diagrams a few times and become confident with the methods, you won’t need to draw the diagrams every time!

Add and subtract fractions within 1 - Part a

In this video we practise finding a common denominator using our knowledge of equivalent fractions. We use this skill to add two fractions with different denominators.

Add and subtract fractions within 1 - Part b

In this video we practise finding a common denominator using our knowledge of equivalent fractions.

We learn to subtract two fractions with different denominators. We will also think about why we have to use a common denominator to add or subtract fractions.

Practise

Activity 1

Add and subtract fractions worksheet 1

These activities help you develop a deep understanding of how to add and subtract fractions by using a common denominator.

For each question, remember to first think about which fraction you will convert and why.

Check here for the answer sheet

Activity 2

Add and subtract fractions worksheet 2