# How do you write #0.0001# in scientific notation?

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In scientific notation, we write a number so that it has single digit to the left of decimal sign and is multiplied by an integer power of

Note that moving decimal

Hence, we should either divide the number by

In other words, it is written as

To write

Hence in scientific notation

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Decimals are a form of writing fractions which have powers of

Using the law of indices:

A short way of changing to scientific notation is to move the decimal point until there is only one (non-zero) digit to the left of the point. The number of places moved is the index.

Point moves to the right, the index decreases.

Point moves to the left, the index increases.

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