Add HalfHours to a Time
Add Hours to Clock Time: Learn
How to add hours and halfhours to a time:

Add the minutes together. If the result is 60 or more,
 subtract 60 from the minutes
 add 1 to one of the hours

Add the hours together. If the result is more than 12,
 Subtract 12 from the number of hours
 Switch AM to PM (or the reverse)
 Repeat until the hours are 12 or less
 If the final hours are exactly 12, switch AM to PM or PM to AM.
Example: What time is 17 hours and 30 minutes after 3:30 AM?

Add the minutes: 30 + 30 = 60. Since this number is 60 or more,
 Subtract 60 from the minutes (6060 = 0 minutes).
 Add 1 to the hours (17+1 = 18 hours)

Add the hours: 18 + 3 = 21 hours. Since this number is more than 12,
 Subtract 12 from the hours (2112 = 9 hours)
 Change AM (the original time) to PM.
 Final answer: 9:00 PM
Add Half Hours: Practice
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