Nota Terkini

Thursday, March 17, 2011

[Mathematic Form 1] Convert 24-hour system into the 12-hour system

To convert the 24-hour system into the 12-hour system, follow the step below;
  1. If the time is between 0000 hours and 0059 hours

    You should...

    • Add 12.00

    • Add a dot between the hours and minutes

    • Write am

      Example:

      • 0035 + 12.00 = 1235. So, 0035 = 12.35am


  2. If the time is between 0100 hours and 1259 hours

    You should...

    • Remove the zero if necessary

    • Add a dot between the hours and minutes

    • Write am or pm

      Example:

      • 0530 = 5.30am

      • 1235 = 12.35pm


  3. If the time is between 1300 hours and 2400 hours

    You should...

    • Subtract 1200 from it

    • Add a dot between the hours and minutes

    • Write pm

      Example:

      • 1428 - 1200 = 228. So, 1428 = 2.28pm

      • 2358 - 1200 = 1158. So, 2358 = 11.58pm

More Examples:
  1. Convert each of the following into 24-hour system.

    • 12.36am = 0036

    • 3.45am = 0345

    • 12.50pm = 1250

    • 4.37pm = 1637

  2. Convert each of the following into 12-hour system.

    • 0048 = 12.48am

    • 0539 = 5.39am

    • 1255 = 12.55pm

    • 1729 = 5.29pm


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