PEMDAS, or Please Excuse My Dear Aunt Sally
Last week, my entire family decided to go out for a nice dinner together, so we picked one of our favorite restaurants and headed down. I was hoping that all would go well and the worst would not happen. Unfortunately, after we started eating, I could see my Aunt Sally becoming uncomfortable. We were almost done and were about to leave when it happened - Aunt Sally let out this horrendous cloud of noxious, foul-smelling gas. It was so bad that we had to evacuate the restaurant!
As we were waiting to go back inside to pay for our meal, I went around to each of the employees to apologize. "Please," I said, "Please excuse my dear Aunt Sally!"
What is the point of this silly story? If you can remember the above sentence - please excuse my dear Aunt Sally - then you can remember the order of operations! Simply look at the first letter of each word: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction! A similar mnemonic, due to Danica McKellar, is "Pandas Eat: Mustard on Dumplings, and Apples with Spice".