# Using number bonds within 20 for subtraction

In this lesson we will be using our knowledge of number bonds within ten to begin deriving number bonds within 20.

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 4

Q1.My parts are 2 and 5. What is my whole?

1/4

Q2.My parts are 3 and 6. What is my whole?

2/4

Q3.What is 16 + 3?

3/4

Q4.Five plus thirteen is equal to _________

4/4

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 4

Q1.My parts are 2 and 5. What is my whole?

1/4

Q2.My parts are 3 and 6. What is my whole?

2/4

Q3.What is 16 + 3?

3/4

Q4.Five plus thirteen is equal to _________

4/4

# 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:

# Using number bonds within 20 for subtraction

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

## Question 4

Q1.My whole is 6. One of my parts is 3. What is the other part?

1/4

Q2.My whole is 5. One of my parts is 2, What is the other part?

2/4

Q3.What is 17 - 5?

3/4

Q4.Fifteen subtract four is equal to _______.

4/4

Quiz:

# Using number bonds within 20 for subtraction

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

## Question 4

Q1.My whole is 6. One of my parts is 3. What is the other part?

1/4

Q2.My whole is 5. One of my parts is 2, What is the other part?

2/4

Q3.What is 17 - 5?

3/4

Q4.Fifteen subtract four is equal to _______.

4/4

# Lesson summary: Using number bonds within 20 for subtraction

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