Year 8

Year 8

# Rounding and Range

## Lesson details

### Key learning points

1. In this lesson, we will learn about range when it comes to rounding numbers. We will investigate what range a number could be in based upon how it was rounded.

### Licence

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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### 6 Questions

Q1.
Round 0.0078 to 1 s.f.
0.008
1
1.0000
Q2.
Using a calculator or otherwise, work out the volume of a cube with length 6.5cm. Give your answer to 3 significant figures.
270
274
275.000
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.
47
47.04
470
Q4.
Round 13490 to 2 s.f.
13
13.000
13400
Q5.
Calculate √45 correct to 3 s.f.
6.70
6.700
6.708
Q6.
Use your calculator to work out the value of:
4
4.0
5.0

## Exit quiz

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### 6 Questions

Q1.
A teacher asked two students to round the number 5,469,704. Their answers are below. Which student(s) rounded the number correctly? Explain your answer.
Correct answer: Both students are correct
Neither students are correct.
Student A said that the number rounds to 5,000, 000
Student B said the number rounds to 5,500,000
Q2.
I think about a number and rounds it to the nearest hundred. My answer is 5300. What is the greatest possible number I could have thought of?
5250
5299
5399
Q3.
Halima is planning a concert to raise money for charity. Entry to the concert is £5.00. The number of people attending the concert is 700 to the nearest hundred. What is the lowest possible amount of money she raised for charity?
£3,542
£32.50
3,745
Q4.
The population of Northern Ireland is 1.9 million, to the nearest hundred thousand. What is the lowest possible number of people that live in N.Ireland?
1,849,999