Rounding and Range

Maths

Accuracy and estimation

Student A said that the number rounds to 5,000, 000

Student B said the number rounds to 5,500,000

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.

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?

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?

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?

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?

The population of Birmingham is 1.1 million rounded to nearest hundred thousand. What is the range of values for the population of Birmingham?

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

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.

Use your calculator to work out the value of:

Rounding and Range

Lesson outcome