1. WARM-UP 8/29: Simplify: -2 + 3 2) 2 + -3 3) -2 + -3
) )
-2 – (-3) 5) 2- (-3) 6) 2 – 3
7) -2 x -3 8) 2 x -3 9) -2 x 3

2. Check Homework…

3. Exponents and Order of Operations
Objectives:
To simplify and evaluate expressions and formulas.
To simplify and evaluate expressions containing grouping symbols.
____________________________________________________
EXPONENTS
31 =
32 =
33 =
42 =
54 =

4. Simplify the following expression. 3 + 5 – 6 ÷ 2 A) 7 B) 5 C) 1

5. ORDER OF OPERATIONS 1. Parenthesis (or Grouping) 2. Exponents 3
ORDER OF OPERATIONS 1. Parenthesis (or Grouping) 2. Exponents 3. Multiply and Divide (from LEFT to RIGHT) 4. Add and Subtract (from LEFT to RIGHT)

6. Examples) Simplify.
6 – 10 ÷ 5
3 · 6 – 42 ÷ 2

7. Examples) Evaluate the following if c = 2 and d = 5.
4c – 2d ÷ c
40 – d2 + cd · 3

8. Examples) Simplify (these “Grouping” problems).
(5 + 3) ÷ 2 + (52 – 3)
8 ÷ (9 – 7) + (13 ÷ 2)

9. Examples) Evaluate each expression for r = 2 and t = 4.
a) rt2
b) r2t
c) (rt)2

10. Challenge
12 + 3[18 – 5(16 – 13)]