


Related Terms 


Real Numbers: All the rational and irrational numbers; that is, all of the numbers that can be expressed as decimals. 
Number Sets: A group of numbers that have a common property.
Integer: The set of numbers ...,3,2,1,0,1,2,3,…
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.
Number Line: A line on which points are marked off at regular intervals (i.e., evenly spaced) and labeled with ordered numbers.
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.
Whole Numbers: The set of numbers 0, 1, 2, 3, 4,….
Decimal: A symbol that uses a baseten placevalue system with multiples of tenths to represent a number.


