2. Do Now 9/10/09 Take out HW from last night. Take out HW from last night.  Text p. 12-13, #14-32 evens & 36 Copy HW in your planner. Copy HW in your planner.  Text p. 19, #10-36 evens  Quiz sections 1.1-1.4 Tuesday In your journal answer the following question. Suppose “#” is a special operation that “a # b” means 4a – 2b. What is 3 # 2? What is 2 # 3? Is # a commutative operation? In your journal answer the following question. Suppose “#” is a special operation that “a # b” means 4a – 2b. What is 3 # 2? What is 2 # 3? Is # a commutative operation?

3. Homework Text p.12-13, #14-32 evens & 36 14). 16). 18). 20). 22). 2 to the 5 th power; 24). 12 cubed; 26). 4 to the 4 th power; 28). 0.6 to the 4 th power; 30). 49; 0.16 32). 2401; 0.0256 36). a. 3375 in³; b. 121.5 lb

4. Evaluate the Expression 3 + 7 x 3 3 + 7 = 10 10 x 3 = 3 33 30 7 x 3 = 21 3 +21 = 2 22 24

5. Objective SWBAT use the order of operations to evaluate expressions.

6. Section 1.3, Order of Operations Order of Operations Order of Operations – the rules established to evaluate an expression involving more than one operation 4(y² – 8) 13 * 22 - 14 5 ÷ x · 6

7. Evaluate expressions within grouping signs. Evaluate expressions within grouping signs. ( ) parentheses, [ ] brackets, fraction bars ( ) parentheses, [ ] brackets, fraction bars Evaluate powers. Multiply and divide from left to right. Add and subtract from left to right. 1 3 4 PEMDAS 2 Order of Operations

8. Evaluate the Expression PEMDAS 4 + 7 x 3 4 + 21 25 25 ² 2 + 7 x 3

9. Evaluate the Expression [2 x (4 + 4)] + 3 PEMDAS [2 x 8] + 3 16 + 3 43 ³ ³ ³ 16 + 27

10. Evaluate the expressions when m = 3. a. (1 + m²) Substitute. Evaluate power. b. m³ – 6 ÷ 6 Substitute. Evaluate power. Divide. (1 + 3²) 3³ – 6 ÷ 6 (1 + 9) 10 Add within parentheses. 27 – 6 ÷ 6 Subtract. 27 – 1 26

11. Divide. Evaluate power. 27 3 2 2 – 3 = 27 9 2 – 3 27 9 2 – 3 = 3 2 – 3 3 2 – 3 = 6 – 3 Multiply. Multiply and divide from left to right. STEP 3 Evaluate the expression 27 3 2 2 3. – There are no grouping symbols, so go to Step 2. STEP 1 Evaluate powers. STEP 2 STEP 4 Add and subtract from left to right. 6 – 3 = 3 Subtract. ANSWER The value of the expression 27 3 2 2 – 3 is 3.

12. = 2[9] Evaluate the expression. a. 7(13 – 8) = = 35 Subtract within parentheses. Multiply. b.b. Rewrite fraction as division. Evaluate within parentheses. Divide. c. 2[30 – (8 + 13)] = Add within parentheses. Subtract within brackets. = 18 Multiply. 7(5) 2[30 – 21]

13. Evaluate the expression when x = 4. 9x 3(x + 2) Substitute 4 for x. Add within parentheses. 18 36 = Multiply. =2 Divide. = 9 4 3(4 + 2)3 6 9 4 =

14. 24 Text p. 19, #10-36 even Homework NJASK7 Prep