Chiral Publishing
Chiral Publishing: An Introduction to Chemistry: Scientific Notation [Pdf]
Learn step by step instructions on how to express numbers in scientific notation. Discover the rules to scientific notation and view several examples of numbers being expressed in scientific notation.
Math2
Math2.org: Exponential Identities
A list of exponential rules and logarithm rules for manipulating such terms and factors in equations or expressions.
Sophia Learning
Sophia: Evaluating an Expression
This lesson demonstrates how to evaluate numerical and algebraic expressions that contain powers following the order of operation rules.