Variable- a letter that represents an unknown number.
For example: a, x, w
Expression- any single number or variable or a combination of operations (+, -, x, /) involving numbers and variables.
For example: 5, r, 8t, x+9, 2y-7
Value- a known or calculated amount.
Constant- a number that does not change
- increases or decreases the value of an expression
Numerical coefficient- a number that multiplies a variable.
For example:
Here is a LINK for practice.Here is a VIDEO about variable and expressions.
