What are rational numbers

1. Number System
Tutorial on Rational Number’s
Class 9

2. What are Rational Numbers
• A number is called rational if it can be expressed
in the form p/q where p and q are integers ( q>
0).
Example : ½ , 4/3 ,5/7 ,1 etc.
• Every integers, natural and whole number is a
rational number. As all them can be expressed in
p/q form
Example : 2 can be expressed as 2/1
• There are infinite rational number between two
rational number

3. Rational Numbers
• They either have termination decimal
expression or repeating non terminating
decimal expression
Example 1.2 or 1.33333….
• The sum, difference and the product of two
rational numbers is always a rational
number.
• The quotient of a division of one rational
number by a non-zero rational number is a
rational number. Rational numbers satisfy
the closure property under addition,
subtraction, multiplication and division.

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