1. Chapter 1 Review

2. Vocabulary Variable: a letter that is used to represent a range of numbers

3. Variable Expressions, Meanings, and Operations

4. You Try It… State the meaning of the variable expression and name the operation.

5. Evaluating Variable Expressions Substitute numbers for the variable (letter) Perform the operations indicated Example: Evaluate the expression when x = 3

6. PEMDAS Parenthesis Exponents Multiplication/Division – In order from left to right Addition/Subtraction – In order from left to right Order of Operations

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

8. Example 2: Evaluate the expression Use order of operations.

9. Example 3: Evaluate the expression Then simplify your answer.

10. You Try It... Evaluate each expression using the order of operations when x = 1.

11. Example 4:

12. You Try It… 1. 2.