Presentation is loading. Please wait.

Presentation is loading. Please wait.

 Order of Operations Algebra Seminar 2012-2013. When do we use Order of Operations?  If you’ve only got one or two operations in an equation, it’s pretty.

Similar presentations


Presentation on theme: " Order of Operations Algebra Seminar 2012-2013. When do we use Order of Operations?  If you’ve only got one or two operations in an equation, it’s pretty."— Presentation transcript:

1  Order of Operations Algebra Seminar

2 When do we use Order of Operations?  If you’ve only got one or two operations in an equation, it’s pretty simple to see what to do first, then second.  Once you get into more complicated equations, however, you need the Order of Operations.  To help remember the order, remember the following sentence:  Please excuse my dear aunt sally.

3 Evaluate Is your answer 33 or 19? You can get 2 different answers depending on which operation you did first. We want everyone to get the same answer so we must follow the order of operations.

4 Please Excuse My Dear Aunt Sally  The first letter of each word reminds us of the order:  Please – P stands for Parentheses (grouping symbols)  Excuse – E stands for Exponents  My – M stands for Multiplication  Dear – D stands for Division  Aunt – A stands for Addition  Sally – S stands for Subtraction

5 PEMDAS  Parentheses  Exponents  Multiplication, Division, Addition, and Subtraction are done from left to right.

6 Evaluate the expression when x=4. Start with the expression Substitute in 4 everywhere you see an x Use PEMDAS! Parentheses first Finish parentheses, next is exponents! Multiply next. Finish up!

7 Experiment  Use the expressions  Arrange grouping symbols (parentheses) to make this expression equal:  146  54  38  Don’t change the order of the values!

8 Example #1  Using the left – to – right rule:   Using the left – to – right rule:   Using the left – to – right rule: 

9 Example #2  Using the left – to – right rule

10 Example #3  Sometimes the fraction bar can be considered a grouping symbol

11 Example #4  Try this one:

12 Calculator Test  Enter this into your calculator  If you got 6.1 then your calculator automatically does the order of operations for you.  If you got 0.6 then your calculator does not use order of operations and you’ll need to use the parentheses when you enter equations into your calculator.

13 Solve the problem: · , ,996 Answer Now

14 Simplify: (10 - 3) Answer Now

15 Simplify: 24 – 6 · 4 ÷ 2 Answer Now

16 What is the value of -10 – 4x if x = -13? Answer Now

17 What is the value of 5k 3 if k = -4? Answer Now


Download ppt " Order of Operations Algebra Seminar 2012-2013. When do we use Order of Operations?  If you’ve only got one or two operations in an equation, it’s pretty."

Similar presentations


Ads by Google