Adding and subtracting 3 digit numbers

In this lesson, we will add and subtract with three digit numbers, we will also add and subtract with regrouping. We will compare the effect of adding and subtracting ten and one hundred, using Dienes blocks and place value tables to help us.

Video

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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.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

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

Adding and Subtracting 10 and 100

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

Q1.134 + 10 =

1/8

Q2.827 - 10 =

2/8

Q3.531 + 100 =

3/8

Q4.246 - 100 =

4/8

Q5.401 - 10 =

5/8

Q6.899 + 10 =

6/8

Q7.701 - 10 =

7/8

Q8.193 + 10 =

8/8

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

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

Adding and Subtracting 10 and 100

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

Q1.134 + 10 =

1/8

Q2.827 - 10 =

2/8

Q3.531 + 100 =

3/8

Q4.246 - 100 =

4/8

Q5.401 - 10 =

5/8

Q6.899 + 10 =

6/8

Q7.701 - 10 =

7/8

Q8.193 + 10 =

8/8

Lesson summary: Adding and subtracting 3 digit numbers

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