# Rounding to significant figures (Part 2)

In this lesson, you will learn how to round decimal numbers to a given significant figure.

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 6

Q1.What does degree of accuracy mean?

1/6

Q2.How many significant figures does 0.0045 have?

2/6

Q3.How many significant figures does 5610 have?

3/6

Q4.Rounding 405.3 to the nearest integer is the same as rounding to ________ significant figures.

4/6

Q5.Round 7906 to 3 s.f.

5/6

Q6.What does significant figure tell us?

6/6

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 6

Q1.What does degree of accuracy mean?

1/6

Q2.How many significant figures does 0.0045 have?

2/6

Q3.How many significant figures does 5610 have?

3/6

Q4.Rounding 405.3 to the nearest integer is the same as rounding to ________ significant figures.

4/6

Q5.Round 7906 to 3 s.f.

5/6

Q6.What does significant figure tell us?

6/6

# 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:

# Rounding to Significant Figures

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

## Question 6

Q1.Round 0.0078 to 1 s.f.

1/6

Q2.Using a calculator or otherwise, work out the volume of a cube with length 6.5cm. Give your answer to 3 significant figures.

2/6

Q3.Find the area of a rectangle with a base of 9.8 cm and a height of 4.8 cm. Give your answer to 3 s.f.

3/6

Q4.Round 13490 to 2 s.f.

4/6

Q5.Calculate √45 correct to 3 s.f.

5/6

Q6.Use your calculator to work out the value of:

6/6

Quiz:

# Rounding to Significant Figures

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

## Question 6

Q1.Round 0.0078 to 1 s.f.

1/6

Q2.Using a calculator or otherwise, work out the volume of a cube with length 6.5cm. Give your answer to 3 significant figures.

2/6

Q3.Find the area of a rectangle with a base of 9.8 cm and a height of 4.8 cm. Give your answer to 3 s.f.

3/6

Q4.Round 13490 to 2 s.f.

4/6

Q5.Calculate √45 correct to 3 s.f.

5/6

Q6.Use your calculator to work out the value of:

6/6

# Lesson summary: Rounding to significant figures (Part 2)

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