# Subtract two surds where you need to simplify

In this lesson, we will learn how to subtract two surds where you may need to simplify at least one surd prior to subtracting.

#### 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.Which calculation can be simplified further?

1/3

Q2.Simplify √12 + √27

2/3

Q3.Simplify fully 3√8 + √50

3/3

#### 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.Which calculation can be simplified further?

1/3

Q2.Simplify √12 + √27

2/3

Q3.Simplify fully 3√8 + √50

3/3

# 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:

# Subtract two surds where you need to simplify

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

Q1.Which calculation can be simplified further?

1/3

Q2.Simplify fully √27 - √12

2/3

Q3.Simplify fully 4√3 - √12

3/3

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

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

# Subtract two surds where you need to simplify

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

Q1.Which calculation can be simplified further?

1/3

Q2.Simplify fully √27 - √12

2/3

Q3.Simplify fully 4√3 - √12

3/3

# Lesson summary: Subtract two surds where you need to simplify

## 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