Page 18 - Mathematics_Std_4
P. 18

cannot be repeated more than three times when written to the
              right of a larger number. In numerals, these numbers correspond
              to 1, 10 and 100.


              The numbers IV and IX represent ones. Therefore, when these
          FOR ONLINE READING ONLY
              numbers are written after higher  value, then, the numbers are
              added to the larger number.


              Read the numbers in the following table:

               Roman numbers                 Numbers in words                 Numerals

                   LV                            fifty-five                      55
                   LIX                           fifty-nine                      59

                   LXXXIX                        eighty-nine                     89

                   LXXII                         seventy-two                     72

                   XCIX                          ninety-nine                     99

                   LXIV                          sixty-four                      64

                   LVIII                         fifty-eight                     58

                   LXI                           sixty-one                       61

                   LXXIII                        seventy-three                   73

                   LXXXV                         eight-five                      85




                     Example 1

                Write the following Roman numbers in words:

                  (a) LXV         (b) LXXVI         (c) XCIX         (d) LIV


                Solution
                (a) LXV 60       +5
                           =

                             = 65
                     Therefore, the number LXV is sixty-five.


                                                   11





                                                                                          06/11/2024   17:16:56
     MATHEMATICS STD 4 PB 2024.indd   11                                                  06/11/2024   17:16:56
     MATHEMATICS STD 4 PB 2024.indd   11
   13   14   15   16   17   18   19   20   21   22   23