Teacher2Teacher 
Q&A #212 
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From: Sharon Davis <shdavis@mcpss.com> To: Teacher2Teacher Public Discussion Date: 2008020716:26:08 Subject: Re: teaching elapsed time Thank you so much for reminding me of this. It has been a while. So, to shorten these directions couldn't you say this: Add 12 to the time that passes the "midnight" (12:00 a.m.) or "midday" (12:00 p.m.) time and subtract the other time. For example: If a person leaves for a prom at 7:15 p.m. and doesn't get home until 2:00 a.m., you would add 12 to the 2:00 a.m. and subtract the 7:15 and get 6:45 which is 6 hours and 45 minutes in elapsed time. OR Two children were born on the same date. One was born at 12:31 a.m. and the other at 1:56 p.m., you would add 12 to the 1:56 to make it 13:56 and subtract 12:31 and get 1:25. That would make them 1 hour and 25 minutes or 85 minutes apart.
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