Chapter 1 Review

Vocabulary• Variable: a letter that is used to represent a

range of numbers

Variable Expressions, Meanings, and Operations

You Try It…State the meaning of the variable expression

and name the operation.

Evaluating Variable Expressions

• Substitute numbers for the variable (letter)• Perform the operations indicated

Example: Evaluate the expression when x = 3

PEMDAS• Parenthesis

• Exponents

• Multiplication/Division– In order from left to right

• Addition/Subtraction– In order from left to right

Order of Operations

Example 1: Evaluate the expression .Use order of operations.

Example 2: Evaluate the expression Use order of operations.

Example 3: Evaluate the expression Then simplify your answer.

You Try It...Evaluate each expression using the order

of operations when x = 1.

Example 4:

You Try It…1.

2.