What acronym represents the order of operations in mathematics?

The acronym PEMDAS helps remember the order of operations in mathematics, which is crucial for solving expressions correctly. Each letter stands for a specific mathematical operation: P for Parentheses, E for Exponents, MD for Multiplication and Division (from left to right), and AS for Addition and Subtraction (from left to right). This indicates that when evaluating expressions, you should first solve any calculations inside parentheses, then address exponents, followed by any multiplication or division, and finally perform addition and subtraction.

Understanding this order is essential because it ensures that everyone arrives at the same answer when simplifying expressions. For example, in the expression 3 + 6 × (5 + 4), if you follow PEMDAS, you first solve the parentheses (5 + 4 equals 9), then perform the multiplication (6 × 9), and finally the addition (3 + 54) to get 57. Following the correct order prevents misinterpretation and ensures accuracy in mathematical calculations.