GCSE Maths Quiz

Estimation in Arithmetical Calculations (F)

When performing calculations, it’s always good to carry out a common-sense check and have a rough idea of the answer. This is true even if you are working with a calculator, as it is easy to mis-type an entry! Put your estimating and approximation skills to the test in this GCSE Maths quiz.

Approximating is all about making the calculation easier, by rounding each number to 1 significant figure. Very often, you will then be able to do it in your head. Things can get a little bit trickier when division is involved – ideally, you want both the numerator and denominator to have a common factor, so that one is a multiple of the other and it will cancel down.

Working out an approximate answer will give you an indication of the size of the answer (this is often called the ‘ball park figure’).

Read More

If your approximation tells you the answer is in the hundreds, but your proper calculation gives an answer smaller than 1, then you know you have gone wrong somewhere. Engineering disasters have resulted from errors in calculations, so it is important to get it right!

Look for everyday opportunities to practise your estimating skills – what’s the total of your shopping basket, how much change would you get from a £20 note, how many MP3 downloads can I get from a £5 voucher… the list is endless!

Read Less
Did you know...

You can play all the teacher-written quizzes on our site for just £9.95 per month. Click the button to sign up or read more.

Sign up here
  1. Question 1

    Helpful comment
  2. Question 2

    Helpful comment
  3. Question 3

    Helpful comment
  4. Question 4

    Helpful comment
  5. Question 5

    Helpful comment
  6. Question 6

    Helpful comment
  7. Question 7

    Helpful comment
  8. Question 8

    Helpful comment
  9. Question 9

    Helpful comment
  10. Question 10

    Helpful comment

Author: Frank Evans

© 2014 Education Quizzes

TJS - Web Design Lincolnshire

Welcome to Education Quizzes
Login to your account