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For example, let us subtract the binary number (111)  from (1000) .
                                                                   2            2
                                                     1     1
                                                 0  (10)  (10)  (10) _____ Borrow

                                                 1   0     0    0

                                             –       1     1    1

                                                 0   0     0    1

             Tech


               Funda
                           Modern day binary number system was invented by Gottfried Lebiniz in 1679.








               Recap


                     A number system is simply a manner of counting.
                     The decimal number system consists of ten digits from 0 to 9.

                    The binary number system consists of two digits 0s and 1s.
                     The  octal  number  system is used  as  a  shorthand  representation  of  long  binary
                   numbers.
                     The hexadecimal number system consists of 16 digits from 0 to 9 and A to F.



                                                   Exercise




            A.  Tick ( ) the correct option.
               1.   In the binary number system, the right-most digit before the fractional point is called ..........................

                  a.  MSD                                       b.  LSD

                  c.  BSD                                       d.  None of these

               2.  What is the another name for Base 2?
                  a.  Binary number system                      b.  Hexadecimal number system

                  c.  Decimal number system                     d.  Octal number system

               3.  What are the two symbols present in the binary number system?

                  a.  1 and 2                                   b.  0 and 1

                  c.  8 and 9                                   d.  5 and 6


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