Numerical Expressions Flashcard

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What is a numerical expression?

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A numerical expression is a mathematical phrase that includes numbers and operations (like addition, subtraction, multiplication, and division) but does not have an equal sign.

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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 performing the operations in the correct order.

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What is the order of operations?

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

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How do you simplify an expression?

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To simplify an expression, combine like terms and perform operations according to the order of operations.

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What is the difference between an expression and an equation?

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An expression is a combination of numbers and operations without an equal sign, while an equation states that two expressions are equal and includes an equal sign.

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What does it mean to find the value of an expression?

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Finding the value of an expression means substituting numbers for variables and performing the operations to get a single number.

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What is the expression for 'subtract 7 from 19 and then divide by 3'?

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