Evaluate Expressions

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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 the variables with their given numerical values.

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What is the order of operations used in evaluating expressions?

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The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often remembered by the acronym PEMDAS.

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What is a variable in an expression?

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A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

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What is a constant in an expression?

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A constant is a fixed value that does not change, such as numbers like 5, -3, or 12.

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What does it mean to simplify an expression?

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To simplify an expression means to combine like terms and perform operations to reduce it to its simplest form.

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