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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.

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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.

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6 Questions

Q1.
Round 0.0078 to 1 s.f.
Correct answer: 0.007
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
Correct answer: 275
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
Correct answer: 47.0
47.04
470
Q4.
Round 13490 to 2 s.f.
13
13.000
Correct answer: 13000
13400
Q5.
Calculate √45 correct to 3 s.f.
6.70
6.700
6.708
Correct answer: 6.71
Q6.
Use your calculator to work out the value of:
An image in a quiz
4
4.0
Correct answer: 5
5.0

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
Correct answer: 5349
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?
Correct answer: £3,250
£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
Correct answer: 1,850,000
1,899,000
1,949,999
Q5.
The population of Northern Ireland is 1.9 million, to the nearest hundred thousand. What is the greatest possible number of people that live in N.Ireland?
1,850,000
1,899,999
1,949,000
Correct answer: 1,949,999
Q6.
The population of Birmingham is 1.1 million rounded to nearest hundred thousand. What is the range of values for the population of Birmingham?
1,050,000 ≤ x 1,100,000
1,050,000 ≤ x <1,099,000
Correct answer: 1,050,000 ≤ x <1,099,999