7.PFA.2 Expressions Flashcard Review

Front

What is the distributive property in algebra?

Back

The distributive property states that a(b + c) = ab + ac. It allows you to multiply a single term by two or more terms inside a set of parentheses.

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25

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 4(-x + 1) is an algebraic expression.

Front

Use the distributive property to simplify: 3(2x + 4)

Back

6x + 12

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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 variables and performing the operations.

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34

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. For example, |3| = 3 and |-3| = 3.

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Evaluate: 30 - 14 • 2 + 8

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10

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What is a variable in algebra?

Back

A variable is a symbol, often a letter, that represents one or more numbers. For example, in the expression 2x + 3, 'x' is a variable.

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What is the order of operations in mathematics?

Back

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.