How to use estimation to check your answers

Estimation

You can use estimation to get a rough idea of a calculation. Round the numbers to make it easier.

Then do the calculation. If it's really different to the estimation, a mistake has been made.

Try re-doing the calculation or use a different method to find the answer.

Rounding and estimating, there's more to learn...

This guide
Dan on a platform

How to use estimation to check your answers