Applying rounding for estimating (subtracting)

This lesson will build on knowledge of the 10 times table in order to estimate by rounding to answer subtraction questions

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.

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 1

Question 2

Question 3

Question 4

Question 5

Q1.Which of numbers does not need to be rounded to the nearest 10?

1/5

Q2.What is 27 rounded to the nearest 10?

2/5

Q3.What is 523 rounded to the nearest 10?

3/5

Q4.Round to estimate this answer 102 + 45 =

4/5

Q5.What is 1999 rounded to the nearest 10?

5/5

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.

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 1

Question 2

Question 3

Question 4

Question 5

Q1.Which of numbers does not need to be rounded to the nearest 10?

1/5

Q2.What is 27 rounded to the nearest 10?

2/5

Q3.What is 523 rounded to the nearest 10?

3/5

Q4.Round to estimate this answer 102 + 45 =

4/5

Q5.What is 1999 rounded to the nearest 10?

5/5

Video

Play 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:

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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.

Quiz:

Applying rounding to estimate (subtraction)

Let's see what you have learnt today about rounding to estimate and subtract

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What is 554 rounded to the nearest 10?

1/5

Q2.Does this look like a good estimate? 720 - 30 = 500

2/5

Q3.Does this look like a good estimate? 575 - 159 = 415

3/5

Q4.What is an estimated answer here? 604 - 350 =

4/5

Q5.What is this number rounded to the nearest 10? 996

5/5

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.

Quiz:

Applying rounding to estimate (subtraction)

Let's see what you have learnt today about rounding to estimate and subtract

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What is 554 rounded to the nearest 10?

1/5

Q2.Does this look like a good estimate? 720 - 30 = 500

2/5

Q3.Does this look like a good estimate? 575 - 159 = 415

3/5

Q4.What is an estimated answer here? 604 - 350 =

4/5

Q5.What is this number rounded to the nearest 10? 996

5/5

Lesson summary: Applying rounding for estimating (subtracting)

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