Measuring Time Worksheet

Measuring Time Worksheet ajlill Mon, 12/08/2008 - 19:41

Name: _____________________________


Remember: 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day.


How to add and subtract time.


Suppose Rilie studies from 3:48 to 7:05, how would you go about calculating how long he studied?
One way is to do addition. He studies 12 minutes to get to 4:00, plus 3 hours to get to 7:00, plus 5 minutes to get to 7:05, for a total of 3:17. This same method can be extended to include seconds, or even days and years.
The other way is to do subtraction, but there's a catch. You have to be careful when borrowing between different units.

7:05 -> 6:65
-3:48 -3:48
------- -------
3:17

Notice how, when we borrowed from the hour, we only got 60, not 100 as we would have if we were subtracting 348 from 705.


Practice:
4 runners want to recreate the run from Marathon to the Acropolis in Athens. The each leave at 7:45am. Use the runners finish time to calculate the elapsed time

Finish Time Elapsed Time
Runner 1 10:52 ______________________________
Runner 2 10:34 ______________________________
Runner 3 12:14 ______________________________
Runner 4 12:05 ______________________________

Which runner is the fastest?
Which runners took more that 4 hours?

In your groups, try these activities, and come up with some of your own. Each person in the group should try these and have a partner record the start and end times.

Activity Estimate Start time End time Elapsed time
1. Sing Jingle Bells
2 10 Jumping Jacks
3. Walk across the classroom
4. 
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8. 

Extend your thinking:
Including washrooms, there are about 7 rooms between us and the office. Calculate how long it would take you to walk to the office.

A Day In the Life

A Day In the Life ajlill Tue, 12/09/2008 - 08:35

Name: __________________________
Record what you do during the next 24 hours on this chart, and calculate the time you spend on each activity. For example, from 3:05 to 3:24 Walk home, 3:24 to 5:00 do homework, ...

Activity Estimate Start time End time Elapsed time
1.
2
3.
4. 
5. 
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