[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