The term "PEMDAS" can be remembered through several expanded versions including "Please Excuse My Dear Aunt Sally," "Pudgy Elves May Demand a Snack," "Popcorn Every Monday Donuts Always Sunday," "Please Eat Mom's Delicious Apple Strudels" and "People Everywhere Made Decisions About Sums." It is used as a mnemonic device for the order of operations.
In mathematics, "PEMDAS" stands for "Parentheses, Exponents, Multiplication, Division, Addition, Subtraction." Arithmetic calculations should be performed in the right order to arrive at the correct answer. Multiplication and division, as well as addition and subtraction are equal in rank and should be done from left to right of the equation. In the United Kingdom, "PEMDAS" is known as "BODMAS," which stands for "Brackets, Orders, Divide, Multiply, Add, Subtract."