## 7-2 Powers of 10 and Scientific Notation

**Objectives**: Evaluate and multiply by powers of 10 & covert between standard notation and scientific notation.

**Powers of 10**

When the base is 10, a positive exponent,

decimal n places to the right from 1.

When the base is 10, a negative exponent,

*n*, moves thedecimal n places to the right from 1.

When the base is 10, a negative exponent,

*n*, moves the decimal n places to the left from 1.**Scientific notation**is a method of writing numbers that are very large or very small in a shorter way. It is always written in two parts.