Expressing missing number problems algebraically

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

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.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

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.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

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Worksheet

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Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.

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

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.

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!

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For 5 mins...

Move around:
Jog

On the spot:
Dance