# Counting back in ones to subtract

In this lesson, we will practice subtracting by counting back in ones. We will do this with the support of a number line.

#### 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.First, there were six glasses of juice. Then someone knocked over two glasses. How many glasses are left?

1/3

Q2.First, there were five eggs in the carton. Then, Snow White cracked three to bake a cake. How many eggs were left in the carton?

2/3

Q3.First, there were six glasses of juice. Then someone knocked over two glasses. Now there are four glasses left. Choose the equation that represents this story.

3/3

#### 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.First, there were six glasses of juice. Then someone knocked over two glasses. How many glasses are left?

1/3

Q2.First, there were five eggs in the carton. Then, Snow White cracked three to bake a cake. How many eggs were left in the carton?

2/3

Q3.First, there were six glasses of juice. Then someone knocked over two glasses. Now there are four glasses left. Choose the equation that represents this story.

3/3

# 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:

# Counting back in ones to subtract

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

Q1.Use the number line to solve 8 - 4 =

1/3

Q2.Use the number line to solve 10 - 3 =

2/3

Q3.Use the number line to solve 5 - 2 =

3/3

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

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

# Counting back in ones to subtract

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

Q1.Use the number line to solve 8 - 4 =

1/3

Q2.Use the number line to solve 10 - 3 =

2/3

Q3.Use the number line to solve 5 - 2 =

3/3

# Lesson summary: Counting back in ones to subtract

## 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