The GMDAS rule is a guide used to solve math problems that involve multiple operations. Each letter stands for a step or operation you need to follow in the correct order.G – Grouping symbols like ( ), [ ], { } → Do these firstM – MultiplicationD – DivisionA – AdditionS – SubtractionImportant Note:Multiplication (M) and Division (D) are done from left to right, whichever comes first.Addition (A) and Subtraction (S) are also done from left to right, whichever comes first.