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# Chapter 1-4

### Math Vocab.

TermDefinition
Absolute Value The distance the number is from zero on a number line.
Additive Inverse Two integers that are opposites. The sum of an integer and its additive inverse is zero.
Integer Any number from the set (....-4,-3,-2...0,1,2,3), where... means continues without end.
Opposites Two integers are opposites if they are represented on the number line by points that are the same distance from zero, but on opposite sides of zero. The sum of opposites is zero.
Zero Pair The result when one positive counter is paired with one negative counter. The value of a zero pair is 0.
Bar Notation In repeating decimals, the line or bar placed over the digits that repeat.
Rational Numbers The set of numbers that can be written in the form, where a and b are integers.
Repeating Decimal The decimal form of a rational number.
Terminating Decimal A repeating decimal which has a repeating digit of 0.
Additive Identity Property The sum of any number and zero is the number.
Algebra A branch of mathematics that involves expressions with variables.
Algebraic Expression A combination of variables, numbers, expressions, and at least one operation.
Associative Property The way in which numbers are grouped does not change their sum or product.
Coefficient The numerical factor of a term that contains a variable.
Commutative Property The order in which two numbers are added or multiplied does not change their sum or product.
Constant A term that does not contain a variable.
Distributive Property To multiply a sum by a number, multiply each addend of the sum by the number outside the parentheses.
Factor To write a number as a product of its factor.
Like Terms Terms that contain the same variables raised to the same power.
Multiplicative Identity Property The product of any number and one is the number.
Multiplicative Property Of Zero The product of any number and zero is zero.
Term Each number in a sequence.
Variable A symbol, usually a letter, used to represent a number in mathematical expressions or sentences.
Equation A mathematical sentence that contains an equal sign, stating that two quantities are equal.
Solution A replacement value for the variable in an open sentence. A value for the variable that makes an equation true.
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