Calculate Without Using a Calculator

In this activity, you will be asked to find alternative ways of carrying out the given calculations, as if the '5' key is broken on your calculator.

As a mathematician, it's important you are able to find different ways of solving a calculation, as this demonstrates you have a great set of skills!

Example:

Work out 127 + 25 =

Answer:

127 + 10 + 10 + 2 + 2 + 1 = 152

Let's try some questions.