# Order of operations and arrays

In this lesson, we will be looking at writing calculations whilst obeying the order of operations, using arrays.

#### 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 of the following calculations matches the statement: I start with 12 then I add 5 and then multiply by 5?

1/5

Q2.Which of the following calculations matches the statement: I start with 12 then I add 5 and then multiply by 5 and take away 2?

2/5

Q3.Which of the following calculations matches the statement: I start with 12, I first multiply by 5 and then take away 2?

3/5

Q4.Answer the following: 18 x 3 - 5 x 2

4/5

Q5.Answer the following: 18 x (8 - 6) x 2

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.Which of the following calculations matches the statement: I start with 12 then I add 5 and then multiply by 5?

1/5

Q2.Which of the following calculations matches the statement: I start with 12 then I add 5 and then multiply by 5 and take away 2?

2/5

Q3.Which of the following calculations matches the statement: I start with 12, I first multiply by 5 and then take away 2?

3/5

Q4.Answer the following: 18 x 3 - 5 x 2

4/5

Q5.Answer the following: 18 x (8 - 6) x 2

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:

# Order of operations and arrays

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

Q1.Answer the following: 18 x (5 - 3) + 7

1/5

Q2.Answer the following: 15 - 5 x 2

2/5

Q3.Answer the following: (18 - 7) x (2 + 5)

3/5

Q4.Which of the following statements matches the calculation 15 x (5 - 3)?

4/5

Q5.Which of the following statements matches the calculation 15 x (5 - 3) + 3?

5/5

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

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

# Order of operations and arrays

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

Q1.Answer the following: 18 x (5 - 3) + 7

1/5

Q2.Answer the following: 15 - 5 x 2

2/5

Q3.Answer the following: (18 - 7) x (2 + 5)

3/5

Q4.Which of the following statements matches the calculation 15 x (5 - 3)?

4/5

Q5.Which of the following statements matches the calculation 15 x (5 - 3) + 3?

5/5

# Lesson summary: Order of operations and arrays

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga