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The rules for binary subtraction:                              Let  us  subtract  the  binary  number
                                                                                 (111)  from (1000) .
                          X           Y                   X – Y                       2              2
                                                                                          1     1
                          0           0                 0 – 0 = 0                                        _____
                                                                                     0  (10)  (10)  (10)       Borrow
                                                        0 – 1 = 1
                          0           1
                                             (borrow 1, so that 10 – 1 = 1)          1    0    0     0
                          1           0                 1 – 0 = 1                 –       1    1     1

                          1           1                 1 – 1 = 0                    0    0    0     1


                     Reb          t


                          A number system is a method of counting.
                         The Decimal Number System consists of ten digits from 0 to 9.

                         The Binary Number System consists of two digit, 0 and 1
                         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.



                    OneOne Touch           Learn                                              Section A (Objective)


                  A.  Tick ( ) the correct option.

                      1.  In the binary number system, the right-most digit before the fractional point is called
                         ................................ .

                         a. MSD                                          c. LSD
                         b. BSD                                          d. None of these


                      2.  Base 2 is another name for the ................................ .
                         a. Binary number system                         c. Hexadecimal Number System

                         b. Decimal Number System                        d. Octal number system

                      3.  In Hexadecimal number system, the letters A to F mean ................................ .
                         a. 10 to 15                                     c. 9 to 6

                         b. 10 to 16                                     d. 8 to 15

                      4.  The decimal number (345)  is equivalent to ................................ .
                                                    10
                         a. (101011001)                                  c. (110111001)
                                        2                                               2
                         b. (111011101)                                  d. (111110001)
                                        2                                               2








                  26     Touchpad iPRIME (Ver. 2.2)–VII
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