Unit 5 Lesson 19: Vocabulary

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Equivalent Expressions

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two or more expressions in different forms that always name the same value.

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Like Terms

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two or more items that have the same variable factors.

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Coefficient

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a number that is multiplied by a variable.

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Distributive Property

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multiplying each term in a sum or difference by a common factor does not change the value of the expression. For any numbers a,b,and c, a(b +c) = ab + ac

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Expression

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a group of numbers, variables, and/or operation symbols that represents a mathematical relationship. An expression without variables, such as 3 + 4, is called a numerical expression. An expression with variables, such as 5b², is called an algebraic expression.

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Greatest Common Factor

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the greatest factor two or more numbers have in common.

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Term

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a number, a variable, or a product of numbers, variables, and/or expressions. A term may include an exponent.

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Algebraic

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involving variables or the rules of algebra.

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Value

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the number or quantity that a variable or expression represents.

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Grouping Symbols

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a symbol such as braces {}, brackets [], or parentheses (), used to group parts of an expression that should be evaluated before others.