P
Please - Parentheses

Complete all operations within grouping symbols first.

 
E
Excuse - Exponents

Next, look for exponents. Ignore all other operations and take any numbers with exponents to their respective powers.

 
M
My - Multiplication

Third, look for any numbers that need to be multiplied, and multiply them.

 
D
Dear - Division

Fourth, look for any numbers that need to be divided, and divide them.

 
A
Aunt - Addition

Fifth, look for any numbers that need to be added, and add them.

 
S
Sally - Subtraction

Lastly, look for any numbers that need to be subtracted, and subtract them.

 
Remember to always follow these steps, in order, from left to right!

 
If an operation does not exist in your example, move to the next operation.
Make sure you stay in order.

 
Multiplication and division actually have the same priortity, meaning they can be done in the order they occur, from left to right.

Addition and subtraction also hold the same priority. This means they can also be done in the order they occur, from left to right.