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    E:\Working\Brother_Education\Preparatory_Stage_Maths-3_(11-09-2024)\Open_Files\CHAP_10
                 \ 06-Jan-2024               Sonia Suyal   Proof-1                            Reader’s Sign _______________________ Date __________

                          Project

                     Prepare a  time-table  of your  daily  activities on a  chart  paper  in  24-hour
                     clock time.

                  converting 12-hour clock into 24-hour clock

                          12-hour clock                  Method to convert                         examples

                                                   Subtract 12 hours and write        12:05 a.m.           00:05 hours
                    12 midnight to 12:59 am
                                                   the time without a.m.              12:55 a.m.           00:55 hours

                                                                                      2:45 a.m.          02:45 hours
                                                   Write the same time without
                    1:00 a.m. to 12:59 pm                                             11:38 a.m.           11:38 hours
                                                   a.m. or p.m.
                                                                                      12:28 p.m.           12:28 hours

                                                                                      1:40 p.m.           13:40 hours
                                                   Add 12 hours and write the
                    1:00 p.m. to 11:59 pm                                             4:23 p.m.           16:23 hours
                                                   time without p.m.
                                                                                      10:15 p.m.           22:15 hours

                  converting 24-hour clock into 12-hour clock

                         24-hour clock                 Method to convert                          examples

                   00:00 hours to 00:59          Add 12 hours and write the           00:44 hours           12:44 a.m.
                   hours                         time using a.m.                      00:55 hours           12:55 a.m.

                                                                                       01:15 hours          1:15 a.m.
                   01:00 hours to 11:59          Write the same time using
                   hours                         a.m.                                  08:50 hours          8:50 a.m.
                                                                                      10:25 hours           10:25 a.m.
                   12:00 hours to 12:59          Write the same time using            12:12 hours           12:12 p.m.
                   hours                         p.m.                                  12:48 hours          12:48 pm

                                                                                       13:28 hours          1:28 p.m.
                   13:00 hours to 23:59          Subtract 12 hours and write
                   hours                         the time using p.m.                   16:49 hours          4:49 p.m.
                                                                                       22:17 hours          10:17 pm

                           Practice time 10e

                  1.  Convert the following into the 24-hour format.

                       (a)  3:34 a.m. ________          (b)  4:50 p.m. ________          (c)  7:30 p.m. ________

                       (d)  10:00 a.m. ________  (e)  12 midnight ________  (f)  6:34 p.m. ________

                  Mathematics-3                                                                                         179

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