1'3 Order of Operations

1
1.3 Order of Operations Exponents

• Tricks to remembering?

PEMDAS Please Excuse My Dear Aunt Sally
Parentheses Exponents Multiply or Divide
(left to right) Add or Subtract (left to
right) BEDMAS Big Elephants Destroy Mice And
Snails Brackets Exponents Divide or
Multiply Add or Subtract
Excused
2
1.3 Order of Operations

• Tricks to remembering? - CONT

PEDMAS Pink Elephants Destroy Mice And
Snails Parentheses Exponents Divide or
Multiply Add or Subtract GEMS
Groupings Exponents Multiply or
Divide Subtract or Add
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1.3 Order of Operations

• Groupings (34), (92), 51
• Exponents
• Multiply OR Divide 82, 93
• Subtract OR Add 4-3, 87

Brackets / Parenthesis
Whichever comes first when reading left to right
Whichever comes first when reading left to right
4
Examples
c. 16 42 3 16 8 3 24 3 21

• 24 8 6
• 16 6
• 10
• b. 15 2 6
• 30 6
• 5

5
Evaluating

• An expression is a mathematical statement.
• Evaluating an expression means that you need to
  find the value of the problem.
• A variable is a letter or symbol that can stand
  for a number.

6
Let x 4 and y 6

• x 7
• 3y 12

• xy
• 5x 2y

4 7 11
4(6) 24
3(6) 12 18 12 6
5(4) 2(6) 20 12 32