counting numbers | Also called natural numbers, the numbers 1, 2, 3, 4, ... |
integers | The numbers …, -3, -2, -1, 0, 1, 2, 3… |
irrational numbers | Numbers that cannot be written as the ratio of two integers—the decimal representation of an irrational number is nonrepeating and nonterminating. |
natural numbers | Also called counting numbers, the numbers 1, 2, 3, 4, … |
negative numbers | Numbers less than 0. |
nonrepeating decimals | Numbers whose decimal parts continue without repeating—these are irrational numbers. |
nonterminating decimals | Numbers whose decimal parts continue forever (without ending in an infinite sequence of zeros)—these decimals can be rational (if they repeat) or irrational (if they are nonrepeating). |
rational numbers | Numbers that can be written as the ratio of two integers, where the denominator is not zero. |
real numbers | All rational or irrational numbers. |
repeating decimals | Numbers whose decimal parts repeat a pattern of one or more digits—these are all rational numbers. |
set | A collection or group of things such as numbers. |
terminating decimals | Numbers whose decimal parts do not continue indefinitely but end eventually—these are all rational numbers. |
whole number | The numbers 0, 1, 2, 3, …., or all natural numbers plus 0. |