## Monday, 14 November 2016

### types of numbers

types of numbers

1.Natural numbers
2.Whole numbers
3.integers
4.Rational numbers

*The counting numbers are called natural numbers.  The set of natural numbers is shown by N, is given by N = {1,2,3,4,….}

*All the natural numbers together with zero (0) are called whole numbers

The set W = {0,1,2,3,4,…..}

* The set of negative and positive numbers with zero is called integers.
Z={…..-3,-2,-1,0,+1,+2,+3,….}

*RATIONAL NUMBERS: Numbers of the form like fraction i.e. p/q, where p and q are integers and q≠0, are called rational numbers

 some facts Ø      Every natural number is a whole number Ø      1 is the smallest natural number while 0 is the smallest whole number Ø      Every natural number is a rational number, in general ‘n’ is a natural number, as n=n/1 Ø      Every integer is a natural number, as we can write, if ‘a’ is an integer, then a/1 is a rational number Ø      Every fraction is a natural number, a/b is a rational number