1. Lesson 1.2-Order of Operations, pg. 11 Objectives: To evaluate numerical expressions by using the order of operations. To evaluate algebraic expressions by using the order of operations.

2. Order of Operations Step 1: Grouping symbols - Parentheses - Fraction Bar Step 2: Evaluate all powers Step 3: Do all multiplication and/or division from left to right Step 4: Do all addition and subtraction from left to right.

3. “Please Excuse My Dear Aunt Sally”

4. Ex. 1: Evaluate expressions. 1. 6 + 4 – 2 × 32. 48 ÷ 2³ × 3 + 5

5. Ex. 2: Grouping Symbols 3. (8 – 3) × 3(3 + 2)4. 4[12 ÷ (6 – 2)]²

6. You try! 5. 15 + 3 × 26. 4(11 +7) – 9 × 2

7. Fraction Bars 7.

8. Your turn…. 8.

9. Ex. 4: Evaluate each expression if g=4, h=6, j=8, and k=12. 1.hk – gj 2. 2k + gh² - j 3.2g(h –g) gh - j

10. A computer store has certain software on sale at 3 for $20.00, with a limit of 3 at the sale price. Additional software is available at the regular price of $9.95 each. a)Write an expression you could use to find the cost of 5 software packages. b)How much would 5 software packages cost?

11. Summary Step 1: Grouping symbols - Parentheses - Fraction Bar Step 2: Evaluate all powers Step 3: Do all multiplication and/or division from left to right Step 4: Do all addition and subtraction from left to right.  NBA #2, pg. 14, problems 16-40 even & #31