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Opening Activity In your spirals, write the activities below in order
from what should be done first to what should be done last.
List OnePut on shoesPut on pantsPut on socks
List TwoTake a testStudy
Does the order you do things
matter?
Order of OperationsLG 601: Students will be able to apply and extend previous
understandings of arithmetic to algebraic equations.
Today’s Objective
Think – Pair - ShareHave you ever heard of Order of Operations?
Have you ever heard it referred to as something else?
Order of Operations is often known as
PEMDAS
Order of Operations – A set of rules for evaluating expressions with more than one operation.
PEMDASPleaseExcuseMy DearAunt Sally
ParenthesisExponentsMultiplication & Division
Addition & Subtraction
PEMDASRound Robin
Each player at the team will have approximately 15 seconds to give their opinion to the following questions.
Could we also write PEMDAS as PEDMSA? Why or why not?Multiplication & division are solved at the same level.
Addition and subtraction are solved at the same level.
When a problem has just multiplication & division, or just addition & subtraction, you must work left to right.
Solve the following problems in your spiral
1) 5 + 6 – 3 + 8 2) 10 ÷ 2 x 43) 7 – 5 + 12
16 20 14
Remember to solve left to right
Exponents What are exponents?
Exponents - a number that tells how many times another number, called the base, is used as a factor.
42
Base
Exponent
ExponentsWhat is the correct solution to the expression below?
333 x 3 = 9 or 3 x 3 x 3 = 27x
Your Turn…Write the following exponential expressions in expanded form, then solve. Compare with your shoulder partner when you are done.
24 53
Let’s Put it Together Solve the following expressions using order of
operations.4 x 32 - 5 7 + 4 ÷
22Exponents: 4 x 32 - 5Multiplication: 4 x 9 - 5Subtraction: 36 - 5Answer: 31
Exponents: 7 + 4 ÷ 22Division: 7 + 4 ÷ 4
Addition: 7 + 1Answer: 8
You Try…
3 + 102 ÷ 25 21 ÷ 3 – 5 + 22
What about parenthesis?Parts of the equations that are in parenthesis are always done first, no matter what operation must be performed.
5 x (3 + 3) ÷ 15 5 x 6 ÷ 15 30 ÷ 15 = 2
4 + 62 ÷ (5 + 4)4 + 62 ÷ 94 + 36 ÷ 94 + 4 = 8
You Try…Solve the following problems in your spiral. Compare with your shoulder partner when you are both done.62 ÷ 6 ÷ 3 32 ÷ (2 + 6) x 5 + 5
2 25
Exit SlipA student solved the problem below using the steps listed. Find the error in her steps and answer the following in complete sentences.
1) What was her error?
2) What should she have done instead?
32 + 3 x (5 + 1) ÷ 632 + 3 x (6) ÷ 69 + 3 x 6 ÷ 612 x 6 ÷ 672 ÷ 6 = 12
Homework
Page 122, #1-6Due Monday (Green) or
Tuesday (White)
