
Recommendation article 


Article search 



Add half hours

Addition of Time
How to add hours and halfhours to a time:
 Add the number of minutes together. If the minutes are 60 or more, subtract 60 from the minutes and increase the number of hours by one.
 Add the number of hours to the hours portion of the time.
 If the number of hours is more than 12 do the following:
 Subtract 12 from the number of hours.
 If the time was AM change it to PM, if it was PM change it to AM.
 Repeat this process if the number of hours is still more than 12.
 If the number of hours is equal to 12 change AM to PM or PM to AM.
Example: What time is 17 hours and 30 minutes after 3:30 AM?
 The sum of the minutes equals 60. Subtract 60 from the minutes and increase the hours by one to 18.
 Add the hours together. (18 hours + 3 hours = 21 hours)
 If the number of hours is more than 12 do the following:
 Subtract 12 from the number of hours. (21 hours  12 hours = 9 hours)
 Change the AM to PM.
 Answer: 9:00 PM
What is the Sum of the times?

20061118 22:42:53 
Viewed 1523 times 
Close 

 