Expressions and Equations Vocabulary

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Coefficient

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A numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., 4 in 4x).

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Constant

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A fixed value that does not change. In algebra, it is a number on its own, or sometimes a letter such as a, b, or c to stand for a fixed number.

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Term

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A single mathematical expression. It can be a single number, a variable, or numbers and variables multiplied together.

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Variable

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A symbol used to represent a number in mathematical expressions or equations. Commonly represented by letters such as x, y, or z.

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Expression

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A combination of numbers, variables, and operators (such as + and ×) that represents a mathematical object.

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Equation

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A statement that asserts the equality of two expressions, which are connected by the equals sign =.