Evaluating Expression:

Phase:  Please Excuse My Dear Aunt Sally

Single – variable expressions:

P – Parentheses                     P - Please

E – Exponents                        E - Excuse

M - Multiplications                M- My

D- Division                             D - Dear

A – Addition                           A - Aunt

S- Subtraction                        S – Sally

Evaluate each expression: (please excuse my dear aunt sally)

1. 5 – 6 ÷ 2
1. Multiplication    6 / 2 = 3
2. Subtraction 5 – 3 = 2

Answer: 2

2. -2(10+3)
1. Parentheses (10 + 3 ) = (13)
2. Multiplication -2(13) = -26

Answer: -26

3. 3²(7) +1
1. 3 * 3 = 9(7) + 1
2. 9(7) = 63
3. 63 + 1 = 64

Answer: 64

4. (-5+12)(21- 13)
1. (12 - 5) = (7)
2. (21 – 13) = (8)
3. (7)(8) = 56

Answer: 56

5. (10 – (8-2²))3
1. (8-2²) = (8 – 4 = 4)
2. (10 – 4) = (6)
3. (6)3 = 18

Answer: 18

Evaluating single-variable expressions: “Please Excuse My Dear Aunt Sally”

• 6x when x = 4
  • 6(4) = 24

• 6x when x = -10
  • 6(-10) = -60

• -5p + 9 when p = -1
  • -5(-1) + 9 =
  • 5 + 9 = 14

• 4(c² – 7) when c = -3
  • (-3 * -3) = 9
  • (9 – 7) = 2
  • 4(2) = 8