# Deriving decimal addition and subtraction facts

In this lesson we will add and subtract decimals using our known facts to help us.

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."To multiply by 10, we add a 0"

1/5

Q2.0.036 x 10 =

2/5

Q3."If I divide 6.23 by 100, the answer will be less than 1"

3/5

Q4.The relationship between 0.15 and 150 is...

4/5

Q5.2.5 x _____ = 250

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."To multiply by 10, we add a 0"

1/5

Q2.0.036 x 10 =

2/5

Q3."If I divide 6.23 by 100, the answer will be less than 1"

3/5

Q4.The relationship between 0.15 and 150 is...

4/5

Q5.2.5 x _____ = 250

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:

Well done for completing the lesson! Check what you have learned with this exit quiz for the maths Lesson: Deriving decimal addition and subtraction facts

## Question 5

Q1.Which known fact will help me answer 30 + 40 and 0.03 + 0.04?

1/5

Q2.0.6 + 0.3 = ____

2/5

Q3.If I know 4 + 5 = 9, then I know... (pick two)

Select two (2) boxes

3/5

Q4.If I know 15 + 4 = 19, then I know... (pick two)

Select two (2) boxes

4/5

Q5.What is 0.06 - 0.02?

5/5

Quiz:

Well done for completing the lesson! Check what you have learned with this exit quiz for the maths Lesson: Deriving decimal addition and subtraction facts

## Question 5

Q1.Which known fact will help me answer 30 + 40 and 0.03 + 0.04?

1/5

Q2.0.6 + 0.3 = ____

2/5

Q3.If I know 4 + 5 = 9, then I know... (pick two)

Select two (2) boxes

3/5

Q4.If I know 15 + 4 = 19, then I know... (pick two)

Select two (2) boxes

4/5

Q5.What is 0.06 - 0.02?

5/5

# Lesson summary: Deriving decimal addition and subtraction facts

### Time to move!

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