Applying rounding for estimating (subtracting)

In this lesson, we will build on our knowledge of the 10 times table in order to estimate by rounding. We will do this 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!

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!

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

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Worksheet

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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

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

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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