# Expressing missing number problems algebraically

In this lesson we will be exploring various problems and representing them using algebra.

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!

## Question 5

Q1.t + 7 = 20 What is the value of t?

1/5

Q2.If 5a = 35 What is the value of a?

2/5

Q3.How could we express the perimeter of the rectangle below?

3/5

Q4.How could we express the perimeter of the square below?

4/5

Q5.If 2f + 6= 20. What is the value of f?

5/5

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!

## Question 5

Q1.t + 7 = 20 What is the value of t?

1/5

Q2.If 5a = 35 What is the value of a?

2/5

Q3.How could we express the perimeter of the rectangle below?

3/5

Q4.How could we express the perimeter of the square below?

4/5

Q5.If 2f + 6= 20. What is the value of f?

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.

Quiz:

# Expressing missing number problems algebraically

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

## Question 4

Q1.Which expression would represent the following problem: The cooking time for roast beef is 30 minutes for every kg plus an additional 15 minutes.

1/4

Q2.Which expression would represent the following problem: The cost of a photo album book is £2.50 for binding and printing with an additional cost of 15p per photograph.

2/4

Q3.Which expression would represent the following problem: A singer makes money from selling music. They pay a one-off fee of £25.00 to Oak-Tunes for marketing and distribution costs and receive 55p for each copy of the album sold.

3/4

Q4.Instead of writing 5 x a in an algebraic expression, what could I write instead?

4/4

Quiz:

# Expressing missing number problems algebraically

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

## Question 4

Q1.Which expression would represent the following problem: The cooking time for roast beef is 30 minutes for every kg plus an additional 15 minutes.

1/4

Q2.Which expression would represent the following problem: The cost of a photo album book is £2.50 for binding and printing with an additional cost of 15p per photograph.

2/4

Q3.Which expression would represent the following problem: A singer makes money from selling music. They pay a one-off fee of £25.00 to Oak-Tunes for marketing and distribution costs and receive 55p for each copy of the album sold.

3/4

Q4.Instead of writing 5 x a in an algebraic expression, what could I write instead?

4/4

# Lesson summary: Expressing missing number problems algebraically

### 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

### Take part in The Big Ask.

The Children's Commissioner for England wants to know what matters to young people.