1. Evaluating Expressions

2. Review: “Evaluate” Evaluating an expression means to plug in!
For example:
2n + 4 for n = 3
2(3) + 4 10

3. Review: Order of Operations
Please- Parentheses Excuse- Exponents My- Multiplication Dear- Division Aunt- Addition Sally- Subtraction

4. Review: Order of Operations
Remember that Multiplication and Division are a pair…do in order from left to right. Addition and Subtraction are also a pair….do in order from left to right.

5. Let’s Practice… Evaluate the following expressions. 3r – 17 for r = 6
10 – 6d for d = 4
3. 5g + 20 – (4g) for g = 5
4. [(3 + p)2 – 2p] for p = 7