Real Number System


INTRODUCTION:

             In the development of science,we should know about properties and operations on numbers which are very important in our daily life.In the earlier classes,we have studied about the whole numbers and the fundamental operations on them.Now,we extend our study to the integers,rations,decimals,fractions and powers in this chapter.   

NUMBERS:


               In real life, we use HINDU ARABIC numerals- a system which consists of the symbols 0 to 9.This system of reading and writing numerals is called,'Base ten system' or 'decimal number system'.

NATURAL NUMBERS:

               Counting numbers are called natural numbers.These numbers start with smallest number 1 and go on without end. The set of all natural numbers is denoted by the symbol 'N'
                            N={1,2,3,4,5.........} is the set of all natural numbers.

WHOLE NUMBERS:

                 Natural numbers together with zero (0) are called whole numbers.These numbers starts with smallest number 0 and go on without end.The set of all whole numbers is denoted by the symbol 'W'.
                  W={0,1,2,3,4............} is the set of ll whole numbers


INTEGERS:

             The whole numbers and negative numbers together are called integers.The set of all integers is denoted by Z 
                Z={.......,-2,-1,0,1,2,3..........} is the set of all inegrs

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