The document discusses the order of operations using PEMDAS as a mnemonic device. PEMDAS stands for Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction. According to PEMDAS, when solving an equation you should: 1) Perform any operations inside parentheses first. 2) Evaluate exponents. 3) Multiply and divide in order from left to right. 4) Add and subtract in order from left to right.