# Standard form calculations

When you add, subtract, multiply and divide standard forms.

There are two methods

## Method 1 - Actually calculate

Either turn the calculation so that you can add, subtract, multiply and divide and use a calculator.

Or

## Method 2 - Use indices rules

Use the rules taught by Indices Mammoth memory to add or subtract the powers.

In fact, the best way is to use both and you have a method then to double-check you have the correct answer.