algebraic expression is a finite additive combination of any number
of terms, such as .
When each variable in an algebraic expression is replaced by a numerical
number and applying the appropriate properties or rules to simply,
the algebraic expression takes on a numerical value, such a process
is called evaluating algebraic expression.
like playing a game, there are certain rules we have to follow in
order to evaluate an algebraic expression.
order of operations rules:
all operations in parentheses first.
all exponential expressions.
multiplication and division as they occur, moving from left to right.
addition and subtraction as they occur, moving from left to right.
the indicated operation: .