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