PEMDAS, BODMAS, MDAS, BEDMAS, GEMDAS, PEDMAS, BIDMAS

In mathematics, the order of operations dictates the sequence in which mathematical expressions are evaluated.

**PEMDAS:**Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Commonly used in the United States.**BODMAS:**Brackets, Orders (Exponents), Division and Multiplication (from left to right), Addition and Subtraction (from left to right). Commonly used in the United Kingdom, India, and other Commonwealth countries.**MDAS:**Multiplication and Division (from left to right), Addition and Subtraction (from left to right). This is a simplified version often used in elementary math.**BEDMAS:**Brackets, Exponents, Division and Multiplication (from left to right), Addition and Subtraction (from left to right). Another variation used in Canada.**GEMDAS:**Grouping Symbols (including parentheses and brackets), Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Similar to PEMDAS but emphasizes grouping symbols.**PEDMAS:**Parentheses, Exponents, Division and Multiplication (from left to right), Addition and Subtraction (from left to right). Similar to PEMDAS but swaps the order of division and multiplication.**BIDMAS:**Brackets, Indices (Exponents), Division and Multiplication (from left to right), Addition and Subtraction (from left to right). Another variation used in some educational systems.