PEMDAS Review

PEMDAS Review

By Sean Lawler

• P

  • Parenthesis

• E

  • Exponent

• MD

  • ​Multiply and Divide Left to right

• AS

  • Add and Subtract​ Left to right

​

Scientific Calculators do this for you

PEMDAS

Parenthesis

Start with the parenthesis. The parenthesis is a separator that keeps one set separate from everything else. Always start with these

​

a+b-(c-d)

​

You would complete c-d first. ​

​

Multiple Choice

Which would you complete first?

$$2\cdot4\div\left(8+9\right)-4$$  

• $$2\cdot4$$  

• $$4\div8$$  

• $$8+9$$  

• $$9-4$$  

Open Ended

What questions do you have so far?

• Exponents are bases raised to a power.

  • This is how many times a base is multiplied by itself

• ​4³

  • Four to the power of 3 ​

  • 4⋅4⋅4

​

4³ = ​64

Exponents

Multiple Choice

What is the base

$$6^7$$  

• 6

• 7

• 279936

• $$6^7$$  

Multiple Choice

What is the solution to the exponent only

$$\left(28-14\right)\div\frac{\left(12-10\right)}{243^0}$$  

• 7

• 0

• 243

• 1

Open Ended

What questions do you have?

• ​Done left to right whichever comes first.

​

Multiply and Divide

Multiple Choice

Which is done first

$$8\div4\cdot12$$  

• Multiply

• Divide

Multiple Choice

Which is done first

$$3\cdot10\div5$$  

• Multiply

• Divide

• ​Goes in order from left to right

• Just like M and D​

Add and Subtract

Multiple Choice

Which is done first

$$4-2+8$$  

• Addition

• Subtraction

• The base is raised to a power

• Look for these after you completed parenthesis

• I would always use a calculator​

Exponents

• Look for these ( ) in the problem

• Start with that operation

• If you have a scientific calculator DO NOT forget them.​

Parenthesis

PEMDAS

PE

• Done last (unless solving for a variable)

• Done from left to right​

Add and Subtract

• Done before you add or subtract

• Always left to right

Multiply and Divide

PEMDAS

Some text here about the topic of discussion

Draw

Put x+y in parenthesis

Draw

Draw a base of 2 and an exponent of 3

Poll

How do you feel about PEMDAS

• I have no clue

• I got it a little

• I'm getting better

• Too easy