Section 4: Arithmetic Operations

When performing a series of arithmetic operations (i.e. addition, subtraction, division, multiplication, exponents), you must perform those operations in a particular order. There is a mnemonic to help you remember the order – PEMDAS:

P Parentheses
E Exponents
M Multiplication
D Division
A Addition
S Subtraction

If you have a series of operations, do what’s in parentheses first, then apply exponents, then do any multiplication or division, and finally do any adding or subtracting.

Example:

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Do what’s in parentheses first (find LCD):

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So now we have 

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Now apply exponents: 

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So now we have 

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Now do multiplication:

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So now we have 

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Now do addition and subtraction (find LCD):

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So our answer is 

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Take Order of Arithmetic Operations Assessment
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