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term the parts of an expression that are added together together. coefficient number in front of a variable like terms terms that have indentical variables and exponents intergers the set of whole numbers and their opposites whole number any of the natural numbers (positive or negative) or zero irrational number numbers that cannot be expressed as terminating or repeating decimals, can't be expressed as a fraction square root a number that when multiplied by itself equals a given number real number any rational or irrational number perfect square a number that is the square of an integer conditional statement a type of logical statement that has two parts, a hypothesis and a conclusion absolute value the distance of a number from zero on a number line equivalent expression expressions that have the same values when numbers are substituted for variables distributive property a property indicating a special way in which multiplication is applied to addition of two or more numbers in which each term inside a set of parentheses can be multiplied by a factor outside the parentheses, such as a(b + c) = ab + ac constant term a term that has a number but no variable rational number an integer or a fraction