Interactive Maths Worksheets Developing & Refreshing Your Maths Skills Standard Form Page 3

Interactive Maths Worksheets

Developing & Refreshing Your Maths Skills

Standard Form

How to Write Numbers in Standard Form

To convert numbers into standard form you consider how to

represent your number in the form of a x 10

1. How could the number written so that only one digit (not a

zero) is in front of the decimal place?

e.g. 850 --> 8.5

2. Then think what you did to that number to get there.

e.g. 850 is 8.5 x 100 (8.5 x 10

)

To convert numbers from their standard form you are multiplying

or dividing by powers of 10.

If the index is a positive number then you are multiplying (i.e.

moving the decimal place to the right ) to return the number to its

equivalent bigger form.

If the index is a negative number then you are 'dividing' ( i.e.

moving the decimal place to the left ) to return the number to its

equivalent smaller form.

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