Types of Numbers

Question	Answer
Natural Numbers	Natural Numbers are normal counting numbers including zero.
Integer Numbers	Integers are positive and negative whole numbers.
Rational Number	Q is the set of numbers that can be written as fractions (ratios of integers). Since a number such as 7 can be written as 7/1, all integers are rational numbers.
Irrational Numbers	An irrational number is one that cannot be written as a fraction, for example √2.
Real Numbers	R is the set of all 'possible real world quantities'.
Ordinal Numbers	When objects are placed in order, ordinal numbers are used to tell their position. For example, if we have a well-ordered set S = {‘a’, ‘b’, ‘c’, ‘d’}, then ‘a’ is the 1st object, ‘b’ the 2nd, and so on.
Numbers for Counting and Measurement	We use natural numbers for counting We use real numbers for measurement

Resource summary

	Created by Jay Patel about 9 years ago