# Adding and subtracting 1-digit numbers to/from 3-digit numbers

In this lesson, we will investigate different mental strategies to add and subtract, including regrouping.

# 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:

# Adding and Subtracting 1-Digit Numbers to/from 3-Digit Numbers Quiz

Let's see what you have learnt about adding and subtracting 1-digit numbers to and from 3-digit numbers today

Q1.Tick the 3-digit number below

1/5

Q2.Which one of these shows a number bond to 20

2/5

Q3.12 + 9 =

3/5

Q4.222 + 7 =

4/5

Q5.308 + 8 =

5/5

Quiz:

# Adding and Subtracting 1-Digit Numbers to/from 3-Digit Numbers Quiz

Let's see what you have learnt about adding and subtracting 1-digit numbers to and from 3-digit numbers today

Q1.Tick the 3-digit number below

1/5

Q2.Which one of these shows a number bond to 20

2/5

Q3.12 + 9 =

3/5

Q4.222 + 7 =

4/5

Q5.308 + 8 =

5/5

# Lesson summary: Adding and subtracting 1-digit numbers to/from 3-digit numbers

## 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