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Scientific notation is a means of abreviating or shortening very large numbers. Scientific notation is written with one numeral to the left of the decimal place, this is a rule, no more than one digit is allowed before the decimal place.

All other digits fall behind the decimal place (obviously).

Since scientific notation is a method abreviating large numbers the original number usually contains lots of digits, making it a big 'yucky' number.

What scientific notation does is round it off and then shorten it by designating it to ten to the power of a number.

For example:

the number 1,58,994,876 written in scientific notation would be 1.59x108

note how the number was shortened and rounded to two decimal places?

Example 2:

The number 0.00000000097832 would be 9.78x10-10

Note how this time ten was to the power of a negative number, this pushes the decimal place right making the number smaller.

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