Page 136 - 'Blast_Into_Math
P. 136

Blast into Math!                         Mathematical perspectives: all aour mase are melong to us



                        We’re in luck, because

                                                         1    1
                                                           =    .
                                                         4   2 2


                        So,


                                                      3    1    1
                                                        =    +    .
                                                      4    2    2 2


                                                                                              3
                                3
                     3.  To write   in base 2, we list the digits which are the numerators. So, we’d write   in base 2
                                4                                                             4
                        as 0.11.

               Let’s do another example. Let’s write   in base 6.
                                                3
                                                4
                                                       1
                     1.  First we check whether or not  > . Since  > , we need to determine its digit. This is
                                                               3
                                                   3
                                                                   1
                                                   4   6       4   6
                                                 3    x
                        the largest x ∈ Z  such that  ≥  . This digit is 4 because
                                                 4    6
                                                  3    4        3    5
                                                    ≥     but     < .
                                                  4    6        4    6












































                                                           136
   131   132   133   134   135   136   137   138   139   140   141