We can solve word problems involving elapsed time by using the strategy Draw a Diagram. We can draw a number line to find the answer to an elapsed time problem. We can also use an analog clock face to help us, but we're focusing on number lines for this lesson (see previous videos 10.3 and 10.4 for these strategies). To find an ending time, we need the starting time and elapsed time. We count on forward from the start time. To find a starting time, we need the ending time and elapsed time. We count back from the ending time. To help us solve word problems, we can circle or underline the question, circle or underline the important facts, and choose a strategy we know. We solve several word problems involving elapsed time and check our answers.

3rd Grade Math 10.3, Measure Time Intervals, Elapsed Time in Minutes
   • 3rd Grade Math 10.3, Measure Time Int...  

3rd Grade Math 10.4, Use Time Intervals, Find start and end times
   • 3rd Grade Math 10.4, Use Time Interva...  

Clocks, Time, and Calendars Playlist
   • Clocks, Time, and Calendars  

3rd Grade Math Playlist (2015)
   • 3rd Grade Math Course  

I'm using the Houghton Mifflin Go Math!
2015 copyright textbook for this playlist.

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