Year 10
Foundation

Year 10
Foundation

# Limits of accuracy

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## Lesson details

### Key learning points

1. 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

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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
Round 128 to one significant figure.
120
128.0
130
Q2.
Round 0.0030482 to two significant figures.
0.00
0.003048
0.31
Q3.
Round 476.8594 to three significant figures.
476.859
480
7
Q4.
Which of the following cannot be rounded to 567 000?
566 900
567 009
567 065
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?
7.089
708.49
710.1

## Exit quiz

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### 5 Questions

Q1.
What is the upper bound of 21 cm rounded to the nearest centimetre?
20.5 cm
21.4 cm
21.49 cm
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?
5 400 500
5 450 000
5 500 000
Q3.
What is the lower bound for 120, rounded to the nearest 5?
115
115.5