# S-Cool Revision Summary

## S-Cool Revision Summary

## Brackets and Memory

Your calculator operates what we call **BODMAS**:

**B**rackets**O**f**D**ivision**M**ultiplication**A**ddition**S**ubtraction

This is the order it will do operations in. **So be careful!**

**The way you can avoid any mistakes is by:**

**1**. Using the Memory.

**2**. Using the Bracket buttons.

**3**. Pressing the '=' sign after each operation.

## Powers and Roots

## Standard Form

Your calculator **Standard Form** buttons will probably say EXP or EE. If you can't find this, have a look at your instruction book.

Remember: your calculator may not show the 'x 10' bit on the screen. The power of 10 is usually a 2-digit number on the far top right.

However, when you write the answers down you must write them in full including the 'x 10' bit!

## Fractions

As you probably know, fractions are divisions and you can do them on your calculator by using the divide button.

However, your calculator will then work in decimals which are sometimes not as accurate and, anyway, we might need to write the answer as a fraction.

Learn how to use your calculator fraction buttons and what the fractions look like on your screen.

Above all, **don't forget to take your calculator with you to your exam!!!**