4th Grade Math 12.9, Word Problem Solving Elapsed Time

We can use the strategy draw a diagram by making a timeline to solve elapsed time problems. A timeline helps is count the number of hours and minutes of elapsed time forward or backward from the given start, or end time, to find the unknown time. There are three parts to elapsed time, start time, elapsed time which is the time gone by, and the end time. We need at least two of these to solve elapsed time problems. Remember, one day is 24 hours. There are 12 hours in the a.m., and 12 hours in the p.m. We solve nine word problems involving elapsed time. We show how to use a timeline forward or backward, how to use addition or subtraction, or how to make a list of time that has elapsed to solve these problems.

3rd Grade Math 10.2, A.M. and P.M.
https://youtu.be/ct9b4rKZxmI

Clocks, Time, and Calendars
https://www.youtube.com/playlist?list=PLKi4WTp6PRGWC6I3ltUlMls0rzLQJlcrl

4th Grade Math 12.8, Compare Units of Time
https://youtu.be/6bUucK8f96o

4th Grade Math Playlist
https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

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

You can practice online using the textbook's website
https://www.gomathacademy.com/

YouTube rating for JoAnn's School videos:
L0 - No strong language
N0 - No nudity
S0 - No sexual situations
V0 - Not violent or disturbing
D0 - No drug reference or content
F0 - No flashing lights content

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