Take a good look at your calculator! Can you find the brackets keys?

There should be one to open brackets (  and one to close brackets ).

To work out the following, simply type it carefully on to your calculator screen, in the order in which it is written.

520 - (577 + 581)  =

Did you get -638 as your answer?

That is correct!

Let's try out some more in the questions that follow.

Don't you just love using your calculator!