Students explore the concept that to solve some problems, they may need to undo the key actions in the problem. This strategy is called working backwards asking the appropriate questions.

Students learn how to add and subtract time. Class notes and practice problems with solutions are provided.

[Free Registration/Login may be required to access all resource tools.] Adding and subtracting units of time.

[Free Registration/Login may be required to access all resource tools.] The video involves filling in a chart of start time, end time, and elapsed time describing how to add and subtract time in hour and minutes. The video is followed by...

On this one page website sharpen your logic and fraction skills while working on this challenge. The solution is available to double check your solution.