PEMDAS
Add yours
Key Questions

PEMDAS is an mnemonic device used to remind students of the order of operations in the calculation of a mathematical problem.
The initials also o along with phrase used by many students and teachers, Please Excuse My Dear Aunt Sally.
P = Parenthesis (brackets)
E = Exponents
M = Multiply
D = Divide
A = Addition
S = SubtractionSolve inside Parenthesis, then do Exponents, Multiply and Divide before you Add and Subtract.
A sample problem may look like this.
#3^2(5)(6  2) + 8# Following the order of operations
Parenthesis first
#3^2(5)(4) + 8# Exponents next
#9(5)(4) + 8# Multiply and Divide now
#900 + 8# Solve by Adding and Subtracting
#908# 
This key question hasn't been answered yet. Answer question

PEMDAS is the order of operations.
The list below is from highest precedence to lowest precedence.
P
#># Parenthesis
E#># Exponents
MD#># Multiplication & Division from Left to Right
AS#># Addition & Subtraction from Left to RightParenthesis have the high precedence and should be worked from the innermost to the outermost.
Next you would work on any expressions that are raised to a power, exponent.
Next if you have multiplication and division those should be evaluated from the leftmost moving to the right.
Lastly, if you have any addition and subtraction those should be evaluated from the leftmost moving to the right.
This is an agreed upon method resolving or evaluating expressions and equations. Without this agreement people working on mathematics would come to different conclusions based on the operations they chose to evaluate at random.
If you ever come to the point where you want some part of an expression or equation to be evaluated at a higher precedence that you just have to enclose it in parenthesis.
Questions
Videos on topic View all (2)
Expressions, Equations, and Functions

1Variable Expressions

2Expressions with One or More Variables

3PEMDAS

4Algebra Expressions with Fraction Bars

5Patterns and Expressions

6Words that Describe Patterns

7Equations that Describe Patterns

8Inequalities that Describe Patterns

9Function Notation

10Domain and Range of a Function

11Functions that Describe Situations

12Functions on a Cartesian Plane

13Vertical Line Test

14ProblemSolving Models

15Trends in Data