# Basic Operations

### Topics

**Scientific notation** is an operation using exponents to write very large and very small numbers. Just like exponents, scientific notation was invented so that we don't have to spend wasted time writing out numbers like (our fingers just cramped typing all those zeros).

Instead we can write this crazy long number as

## Scientific notation has three parts: to it, the coefficient, base, and exponent

**The
coefficient** must be greater than and less than and contain all the
significant digits in the number.

- is not in scientific notation, since the coefficient is greater than
- Neither is , since the coefficient is less than

**The base** is always

**The exponent** is the number of places the decimal was moved to obtain the coefficient.

## How to Do It

- To get the coefficient, move the decimal to the place after the first "significant digit" in the number. Significant digits are all the non-zero digits in a number. However, if there are zeros in between these numbers, then those zeros are significant, too. Drop all non-significant zeros. We know this sounds confusing. Examples (below) will help, we promise!

- Multiply that by

- To get the exponent, count the number of places you moved the original decimal. This is your exponent.

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