# What is scientific notation used for?

##### 1 Answer

Scientific notation is used to write numbers that are too big or too small to be conveniently written in decimal form.

#### Explanation:

In **scientific notation**, we write a number in the form

For example, we write 350 as

In **normalized** or **standard** scientific notation, we write only one digit before the decimal point in

Thus, we write 350 as

This form allows easy comparison of numbers, as the exponent

For huge numbers such as Avogadro’s number, it is much easier to write

For tiny numbers such as the mass of a hydrogen atom, it is easier to write

.

Another reason to use scientific notation is this:

Most of the zeroes in a number such as

Writing the number as