# Algebraic expressions

In this lesson, we will be introduced to algebraic notation and learn how to evaluate and substitute into expressions.

# 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:

# Algebraic Expressions Quiz

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

Q1.Which of the following best describes an expression?

1/5

Q2.Which of the following is NOT an expression?

2/5

Q3.How should we write 5 x a - 2?

3/5

Q4.Which value of x means that 3x < 2x + 1

4/5

Q5.Which value of y means that -3y - 1 > 2y

5/5

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

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

# Algebraic Expressions Quiz

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

Q1.Which of the following best describes an expression?

1/5

Q2.Which of the following is NOT an expression?

2/5

Q3.How should we write 5 x a - 2?

3/5

Q4.Which value of x means that 3x < 2x + 1

4/5

Q5.Which value of y means that -3y - 1 > 2y

5/5

# Lesson summary: Algebraic expressions

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Dance