# Exploring expressions with two variables

In this lesson, we will explore expressions with two variables and how to interpret them. We will also look at examples involving spending money on combinations of pens and pencils.

#### 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.Look at the picture below and then fill in the gap: If the same expression is __________ to two equal quantities, then the two resulting expressions will be equal.

1/5

Q2.Look at the picture below and then fill in the gap: If the same expression is ___________ from two equal quantities, then the two resulting expressions will be equal.

2/5

Q3.Look at the picture below and then fill in the gap: If two equal expressions are both _____________ by the same quantity, then the two resulting expressions will be equal.

3/5

Q4.Look at the picture below and then fill in the gap: If two equal expressions are both __________ by the same quantity, then the two resulting expressions will be equal.

4/5

Q5.If 𝑥 + 𝑦 = 100, then what is the value of 2𝑥 + 2𝑦 - 20?

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.Look at the picture below and then fill in the gap: If the same expression is __________ to two equal quantities, then the two resulting expressions will be equal.

1/5

Q2.Look at the picture below and then fill in the gap: If the same expression is ___________ from two equal quantities, then the two resulting expressions will be equal.

2/5

Q3.Look at the picture below and then fill in the gap: If two equal expressions are both _____________ by the same quantity, then the two resulting expressions will be equal.

3/5

Q4.Look at the picture below and then fill in the gap: If two equal expressions are both __________ by the same quantity, then the two resulting expressions will be equal.

4/5

Q5.If 𝑥 + 𝑦 = 100, then what is the value of 2𝑥 + 2𝑦 - 20?

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:

# Exploring expressions containing two variables

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

Q1.If a protractor costs 50p and a ruler costs 60p, what is the cost of 3 protractors and 2 rulers?

1/5

Q2.Given that p=3 and r=5, evaluate 3p+2r.

2/5

Q3.I want to buy 3 rulers and 3 protractors. If they cost 40 pence each, how much will I spend?

3/5

Q4.Given that y=13, which of the following expressions is equal to 195?

4/5

Q5.If x=4 and y=5, which of the following expressions is equal to 24?

5/5

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

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

# Exploring expressions containing two variables

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

Q1.If a protractor costs 50p and a ruler costs 60p, what is the cost of 3 protractors and 2 rulers?

1/5

Q2.Given that p=3 and r=5, evaluate 3p+2r.

2/5

Q3.I want to buy 3 rulers and 3 protractors. If they cost 40 pence each, how much will I spend?

3/5

Q4.Given that y=13, which of the following expressions is equal to 195?

4/5

Q5.If x=4 and y=5, which of the following expressions is equal to 24?

5/5

# Lesson summary: Exploring expressions with two variables

## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga