To convert a number in standard form to an ordinary number, simply do the multiplication.

is 1,340, since .

is 0.00478, as .

- Question
Convert the following numbers in standard form to ordinary numbers:

= 3**51,000** because the 3 moves 5 places away from the units column. Two places are filled by 5 and 1. Put zeros in the other three places.

= **0.000**308 because the 3 moves 4 places away from the units column. Put zeros in the other 3 places. Focus on the 3, not the 8.

- Question
What are the missing standard form measurements in the table below?

Example Number (metres) Standard form Height of a skyscraper 300 Length of a virus 0.0000003 Size of a galaxy 300,000,000,000,000,000,000 Height of a mountain 3,000 Nucleus of an atom 0.00000000000003 Example Number (metres) Standard form Height of a skyscraper 300 Length of a virus 0.0000003 Size of a galaxy 300,000,000,000,000,000,000 Height of a mountain 3,000 Nucleus of an atom 0.00000000000003