1.1: Evaluate Expressions
Goals: *Evaluate algebraic expressions using basic operations
*Evaluate algebraic expressions using exponents
Variable - ____letter_________, or symbol, used to represent one or more ___numbers_____________.
Ex: x, y, z….
Value – the __number___________ that replaces a variable.
Ex: If x is the variable and x = 3, the value of the variable is 3.
Expression - __math______ sentence that has ___numbers__________, ___operations___________, and
__variables_____________. (**It does NOT have an _____equals_______ ____sign________!!!)
Ex: 5 + x
Algebraic expression – an ____expression_________ that has at least one __variable____________.
Algebraic Expression Meaning Operation
1. 14
𝑦 14 divided by y Division
2. 5 + c 5 plus c Addition
3. 6n 6 times n Multiplication
4. 4 – x 4 minus x Subtraction
**Do NOT use __x__ to show multiplication anymore! *It is too easy to get confused with a variable. Use
parenthesis, middle dot, or don’t need anything if it is a number and a variable.
