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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 __________

                          Encapsulate
                       math
                                                                     tiMe

                               Clock                 reading time              reading time to 5 Minutes Correctness

                                      Second     Quarter Past the Hour                  5 × 12 = 60 minutes
                             11  12  1  hand     1:15 or quarter past 1.  5 × 11 = 55 minutes        5 × 1 = 5 minutes
                           10      2                                                           12
                           9        3                  11  12  1  2    5 × 10 = 50 minutes  10 11  1  2  5 × 2 = 10 minutes
                    Hour   8  7  6  5  4  Minute     9 10      3        5 × 9 = 45 minutes  9  Left  Right 3  5 × 3 = 15 minutes
                    hand                hand          8       4                            8 half  half 4
                                                        7  6  5          5 × 8 = 40 minutes  7  6  5    5 × 4 = 20 minutes
                           24-Hour Clock         Quarter to the Hour       5 × 7 = 35 minutes        5 × 5 = 25 minutes
                                                 4:45 or quarter to 5                   5 × 6 = 30 minutes
                                2400 hours
                                 or
                             2300 hours  0000 hours 0100 hours  12
                           2200 hours  11  12 1  0200 hours  11  1       When the minute hand       When the minute hand
                          2100 hours  10 midnight  2  0300 hours
                             9      3                          2
                         2000 hours  8  4  0400 hours  10                 is in the left half, the   is in the right half, the
                        1900 hours  7  5  0500 hours  9         3
                        1800 hours  6  p.m.  a.m.  6  0600 hours           time is read as to.        time is read as past.
                        1700 hours  5  7  0700 hours   8       4
                            4        8
                         1600 hours  3  9  0800 hours    7  6  5
                          1500 hours  2  1  noon  10  0900 hours
                           1400 hours  12  11  1000 hours
                             1300 hours  1100 hours
                                1200 hours
                                           a.M. and P.M.                          estimating the time     Between times
                                                                                                         (before and after)
                                   Noon  Midnight               Midnight  Noon                              10  11  12  1  2
                         11 a.m.       1 a.m.         11 p.m.       1 p.m.                                 9 8      4 3
                      10 a.m.  11  12  1  2 a.m.   10 p.m.   11  12  1  2 p.m.   In seconds  In minutes       7  6  5
                             10         2                  10        2                                     1 hour before
                      9 a.m.  9         3   3 a.m.  9 p.m.  9         3  3 p.m.              In hours
                              8         4                  8         4
                       8 a.m.   7  6  5   4 a.m.    8 p.m.   7  6  5   4 p.m.                                11  12  1
                          7 a.m.       5 a.m.         7 p.m.        5 p.m.                                  10      2
                                   6 a.m.                  6 p.m.                                          9         3
                                                                                                            8       4
                                                                                                              7  6  5
                                          Writing dates                               Calendar
                                                                                                            1 hour after
                                                                               A calendar is a chart which
                    Example: 15th August, 1947 shall be written in the short form as:  shows days, dates, weeks   11  12  1
                      15    .  08    .   1947       15    /  08    /   1947    and months in a year.        10      2
                                                or                                                         9         3
                       Day   Month      Year        Day     Month     Year         January 2025             8  7  6  5  4
                                                                              Su  M   t  W   th  F  Sa
                                    Conversion                                           1   2   3  4
                                                                               5  6   7  8   9  10  11       timeline

                     1 hour  = 60 minutes  1 week  = 7 days                   12  13  14  15  16  17  18  A timeline shows
                                                                                             23
                                                                                                24
                                                                                                    25
                                                                                         22
                                                                              19
                                                                                  20
                                                                                     21
                     1 minute = 60 seconds  1 month  = 30 day                 26  27  28  29  30  31     the order or
                     1 day   = 24 hours   1 year   = 12 month                                            sequence in which
                                          1 year   = 365 days                                            some events
                                                                                                         happened.
                  Mathematics-3                                                                                         187

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