Order of Operations!

As we learned together in math class, figuring out what order to do certain operations in a numerical expression can be tough.  However, our old faithful rule of "Please Excuse My Dear Aunt Sally" should be memorized to help you with this. 

Remember :
Please (Parentheses)
Excuse (Exponents)
My (Multiplication)
Dear (Division)
Aunt (Addition)
Sally (Subtraction).

Remember, however, that Multiplication and Division are on the same line, so do them in order from left to right, regardless of which comes first.  Same with Addition and Subtraction.

And, because I'm a big geek at heart, here are two inspired people singing the "Order of Operations" song, as set to Rihanna's "Umbrella":



I swear I won't sing that in class...or will I???