P.E.M.D.A.S is a math lesson usually taught between the 4th and 6th grades in the United States. It pertains to the order or precedence of mathematical evaluation - evaluate parentheses first or with most importance, and subtract last or with least importance.
- P = evaluate Parentheses
- E = evaluate Exponents
- M = Mutiply
- D = Divide
- A = Add
- S = Subtract