# Rationalising Surds (Part 1)

In this lesson, we will learn how to rationalise a fraction with a surd in the denominator. We will investigate the concept of rationalising a denominator and explain why this helps simplify our fraction.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.2√10 ÷ 2√5 =

1/5

Q2.9√15 ÷ 3√5 =

2/5

Q3.True or False 4√8 = 8√2

3/5

Q4.

4/5

Q5.

5/5

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.2√10 ÷ 2√5 =

1/5

Q2.9√15 ÷ 3√5 =

2/5

Q3.True or False 4√8 = 8√2

3/5

Q4.

4/5

Q5.

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Rationalising Surds (1)

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Rationalise 2 ÷√2

1/4

Q2.Rationalise

2/4

Q3.Rationalise

3/4

Q4.Rationalise

4/4

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Rationalising Surds (1)

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Rationalise 2 ÷√2

1/4

Q2.Rationalise

2/4

Q3.Rationalise

3/4

Q4.Rationalise

4/4

# Lesson summary: Rationalising Surds (Part 1)

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga