Calculate Without a Calculator

In this activity, you have to select alternative ways of carrying out the given calculations because the '5' key is broken on your calculator.

Example

Work out   56 x 45

Answer

We could, for example, halve the first number and double the second to get

28 x 90

There are many other strategies that you could use, but the important thing is to end up with the correct answer without using the number 5!

Let's have a go at the questions now.