Maths

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Limits of accuracy

In this lesson, we will learn how to find the upper and lower bounds of a rounded value and use this information in simple calculations

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.Round 128 to one significant figure.

1/5

Q2.Round 0.0030482 to two significant figures.

2/5

Q3.Round 476.8594 to three significant figures.

3/5

Q4.Which of the following cannot be rounded to 567 000?

4/5

Q5.A number has been rounded to 709 to three significant figures. Which is the only one of the following that could be that number?

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.Round 128 to one significant figure.

1/5

Q2.Round 0.0030482 to two significant figures.

2/5

Q3.Round 476.8594 to three significant figures.

3/5

Q4.Which of the following cannot be rounded to 567 000?

4/5

Q5.A number has been rounded to 709 to three significant figures. Which is the only one of the following that could be that number?

5/5

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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:

Limits of accuracy

Find the upper and lower bound of a rounded value and use in simple calculations.

Q1.What is the upper bound of 21 cm rounded to the nearest centimetre?

1/5

Q2.The population of Yorkshire is 5 400 000 to two significant figures, what is the greatest possible number of people who live in Yorkshire?

2/5

Q3.What is the lower bound for 120, rounded to the nearest 5?

3/5

Q4.A rectangle has sides of 5.6 cm and 8.4 cm rounded to the nearest millimetre. What is the lower bound for the perimeter?

4/5

Q5.The side length of a square is rounded to the nearest tenth of a centimetre and used to calculate its area of 38.44 cm². What is the lower bound for the perimeter of the square?

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:

Limits of accuracy

Find the upper and lower bound of a rounded value and use in simple calculations.

Q1.What is the upper bound of 21 cm rounded to the nearest centimetre?

1/5

Q2.The population of Yorkshire is 5 400 000 to two significant figures, what is the greatest possible number of people who live in Yorkshire?

2/5

Q3.What is the lower bound for 120, rounded to the nearest 5?

3/5

Q4.A rectangle has sides of 5.6 cm and 8.4 cm rounded to the nearest millimetre. What is the lower bound for the perimeter?

4/5

Q5.The side length of a square is rounded to the nearest tenth of a centimetre and used to calculate its area of 38.44 cm². What is the lower bound for the perimeter of the square?

5/5

Lesson summary: Limits of accuracy

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The next lesson in:
Rounding and Estimating
is:
Estimating answers

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