Evaluate Expressions

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What is the order of operations in mathematics?

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The order of operations is a set of rules that determines the sequence in which calculations are performed. The order is: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often abbreviated as PEMDAS.

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Division should be performed first.

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What is a variable in mathematics?

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A variable is a symbol, often a letter, that represents a number that can change or vary.

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What does it mean to evaluate an expression?

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To evaluate an expression means to calculate its value by substituting numbers for the variables and performing the operations.

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What is the purpose of parentheses in mathematical expressions?

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Parentheses indicate which operations should be performed first in an expression.

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What is the difference between multiplication and division?

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Multiplication is combining equal groups, while division is splitting into equal parts or groups.

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What is an exponent?

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An exponent indicates how many times a number (the base) is multiplied by itself.