- From: Vicki Hopgood
- Date: 16 Feb 1999
*Subject: Standard Form and Powers*
I recently had a question that read: Express 70 Is this a trick question? The number is |

This is not a trick question!
The number 70^{3} is not in standard form.

70^{3} is read "Seventy * to the power * three".
It means

70 × 70 × 70

which is equal to 343 000

A number in standard form looks like this:

A × 10^{n } |

Where A is a number between 1 and 10, and n is a positive or negative whole number |

So the number 343 000 in standard form is

3.43 × 10^{5 }

- The
*A*number is 3.43 (the correct number between 1 and 10) - The
*n*number is 5 because the decimal point has been moved 5 places

Your calculator may show this as `3.43`

but this is just calculator shorthand. You should not copy this down. ^{03 }

Instead, you should write the standard form number as
3.43 × 10^{3 }
to be correct.

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