A time interval is the amount of time between events. It's the amount of time that went by from the start to finish of an event. Elapsed time is a time interval. We discuss how to measure elapsed time in minutes. We find the starting time. We use a number line, analog clock, or subtraction to count the minutes to the ending time. Finding elapsed time by using an analog clock or by using a number line are alike because we begin at the start time and count on for both. We can use one method to find the elapsed time and check our answer with the other method. We see the importance of writing a.m. or p.m. when we write time.

Clocks, Time, and Calendars
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3rd Grade Math Playlist (2015)
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I'm using the Houghton Mifflin Go Math!
2015 copyright textbook for this playlist.

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