# GEMDAS: Order of Operations

If your students understand PEMDAS and its role in the order of operations, GEMDAS will be a breeze. The “P” is replaced with a “G” to represent a wider range of grouping symbols.

#### Learning Objectives

Students will evaluate expressions with parentheses, brackets, or braces in numerical expressions.

#### Introduction

(5 minutes)
• Review PEMDAS as an acronym for order of operations.
• Write an expression on the board that includes parenthesis only. Example: 60 – 4 x (7 -2) + 23 + 32
• Discuss the rules that must be followed and evaluate the expression.
• Rewrite the expression on the board.
• Explain to students that brackets, braces, and other symbols are often used in mathematical expressions as well.
• Have students insert other grouping symbols to this expression.
• Discuss the similarities and differences in the problems.
• Explain that in today’s lesson, they will use a new and more accurate acronym, GEMDAS, to solve problems that have grouping symbols.