Symbols
Any letter used to represent an unknown number.
Variable
The inverse operation to subtraction.
Addition
The first order of operations.
Parenthesis (and other grouping symbols)
17 - 25 =
- 8
A number on its own (no variable).
Constant
The inverse operation to division.
Multiplication
The second order of operations.
Exponents
The number multiplied by a variable.
Coefficient
The inverse operation of addition
Subtraction
The third and fourth order of operations.
Multiplication and division
The inverse operation of multiplication
Division
The fifth and sixth order of operations.
Addition and subtraction
( ), [ ], | |, { } are examples of this type of symbols.
Grouping symbols