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Q&A #212

Teachers' Lounge Discussion: Teaching elapsed time

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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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