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Equations

DEFINITION: a statement that the values of two mathematical expressions are equal (indicated by the sign =). HOW TO: 5 + 2 = 7 4 + 3 = 5 + 2 Both equal 7 so this is called an equation. Everyday Use: Equations are used when determining if two things are equal.

Expressions

DEFINITION: An algebraic expression is a mathematical phrase that can contain ordinary numbers, variables (like x or y) and operators (like add,subtract,multiply, and divide) HOW TO: A + 1 3 + 4b Y = mx + b Everyday Use: Null

Irrational Rational Numbers

Rational and Irrational numbers Definitions: A rational number is part of a whole expressed as a fraction, decimal or a percentage. ... It is a number that cannot be written as a ratio of two integers (or cannot be expressed as a fraction). HOW TO: The square root of 2 is an irrational number because it cannot be written as a ratio of two integers. Khan Link: https://www.khanacademy.org/math/algebra/rational-and-irrational-numbers/alg-1-irrational-numbers/v/recognizing-irrational-numbers

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