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 Related Terms
Number Line:  A line on which points are marked off at regular intervals (i.e., evenly spaced) and labeled with ordered numbers.
 Absolute Value: The absolute value of a number is the distance the number is from zero on the number line. Integer: The set of numbers ...,-3,-2,-1,0,1,2,3,… Interval: A regular distance or space between values. The set of points between two numbers. Irrational Number: A number whose decimal form is nonterminating and nonrepeating. Irrational numbers cannot be written in the form a/b, where a and b are integers (b cannot be zero). So all numbers that are not rational are irrational. Natural Numbers: The set of numbers 1, 2, 3, 4, ... Also called counting numbers. Negative Number: A number less than 0. Opposite Numbers: Two numbers that have the same absolute value but have opposite signs. Positive Number: A number greater than zero. Rational Number: A number that can be written as a/b where a and b are integers, but b is not equal to 0. Real Numbers: All the rational and irrational numbers; that is, all of the numbers that can be expressed as decimals. Whole Numbers: The set of numbers 0, 1, 2, 3, 4,….