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Order of Operations

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Next, since there are no exponents do the multiplication: (5) x 5 = 25 ... Order of Operations Worksheets. Order of Operations Idea Bank ... – PowerPoint PPT presentation

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Title: Order of Operations


1
Order of Operations
  • By Jill Buckett

2
First, heres an example
  • Angora Rabbits are raised for their fur. Each
    rabbit produces enough fur in one year to make 8
    pairs of gloves or 2 sweaters. Joyce Clark combed
    enough fur from her rabbits to make 720 pairs of
    gloves and 210 sweaters. How many rabbits does
    she own?

3
Sort it all out
  • The number of rabbits The number of
  • needed to make 720 rabbits needed to
  • pairs of gloves make 210 sweaters
  • 720 ? 8 210 ? 2
  • 90 105
  • 195

4
  • When an expression has more than one operation,
    you need to use order of operations to solve the
    problem.

5
PEMDAS?
  • P arenthesis
  • E xponents
  • M ultiplication
  • D ivision
  • A ddition
  • S ubtraction

6
Just remember this
  • P lease
  • E xcuse
  • M y
  • D ear
  • A unt
  • S ally

7
So
  • 1. Do all the problems in the parentheses first.
    Also do all the operations above and below a
    division bar.
  • 2. Do all the exponents next.
  • 3. Do all multiplication from left to right.
  • 4. Do all division from left to right.
  • 5. Do all addition from left to right.
  • 6.Do all subtraction from left to right.
  • If any of these are not in the problem,
  • skip that step.

8
Lets try one together!
  • (8 3) x 5 17
  • First, do the parentheses (8 3) 5
  • Next, since there are no exponents do the
    multiplication (5) x 5 25
  • Next, since there is no division do the addition
  • 25 17 42
  • The answer is 42.
  • Since there is no subtraction, youre done!
  • Make sure to look over your work!

9
Try one by yourself now!
  • 4? 3 x 2
  • Remember PEMDAS!
  • Look on the next slide for the
  • correct work and answer.
  • No peeking!

10
The Answer
  • 4? 3 x 2
  • First, since there are no parentheses, do the
    exponents 4? or 4 x 4 16.
  • Next, do the multiplication 3 x 2 6.
  • Now, do the addition 16 6 22.
  • And since there is no subtraction, youre done!
  • The answer is 22.
  • Did you get it right?
  • If you didnt get the correct answer, look back
    in your work to see what you did wrong.

11
-More information for Teachers-
  • Order of Operations Worksheets
  • Order of Operations Idea Bank
  • Order of Operations Evaluating Expressions

12
More information for Students
  • A Maths Dictionary for Kids
  • Order of Operations Review
  • Order of Operations PEMDAS
  • Operation Order Game

13
Worksheet and Quiz with Answers in PDF Format
  • Worksheet
  • Worksheet Answers
  • Quiz
  • Quiz Answers

14
Quiz and Answers in PDF Format
  • http//ellerbruch.nmu.edu/classes/
  • cs255f03/cs255students/jbuckett/P13/
  • orderquiz.pdf
  • http//ellerbruch.nmu.edu/classes/
  • cs255f03/cs255students/jbuckett/P13/
  • answorderquiz.pdf
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