The EzyEducation website uses cookies to help ensure we give you the best experience.
If you continue without changing your settings, we assume that you are happy to receive all cookies on the EzyEducation website.

Continue

# Countdown to Exams - Day 58 - Approximations and Error intervals

On day 58, we take a look at Approximations and Error intervals. When approximating calculations we tend to round each of the numbers to one significant figure. This should then leave us with a simpler calculation to carry out. Approximating your answers is good practice (not just when asked to) so you know if your answer is in the right region and you haven't made any big mistakes.

With error intervals, we are looking to find out what the maximum and minimum value of a rounded number might be. For continuous values, we halve the accuracy level (rounded to) and add it on for the Upper bound and subtract for the Lower bound. You will need to be a bit more careful with discrete values (people on a bus for example)

In the video below, Matt will take you through the topic of approximation and error intervals.

EzyMaths is the ultimate online GCSE Maths support service. Schools can enjoy a free 30-day trial to see for themselves how EzyMaths can support their teaching and help their students achieve better grades.