# Elapsed Time

```By Mrs. Stephanie Estes
is the amount of
time that passes from the start of an
activity to the end of an activity.
For example:
You want to figure out how much time you
spend in school each day.
If your school day starts at 8:00 am and
ends at 3:00 pm,
how much time
is that?
Next are
some ways
that you can
find the
Count Forward
on the clock.
Start
School starts at 8:00 am and ends at
3:00 pm, how much time is that?
End
Count Forward
on the clock.
Start
School starts at 8:00 am and ends at
3:00 pm, how much time is that?
End
Count Forward
on the clock.
School starts at 8:00 am and ends at
3:00 pm, how much time is that?
End
Count backwards
on the clock.
School starts at 8:00 am and ends at
3:00 pm, how much time is that?
End
Use Military Time
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18
A military clock continues counting
after 12:00 noon.
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15
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18
A military clock continues counting after 12:00
noon. Like this
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13
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22
14
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15
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17
A military clock continues counting after 12:00
noon. Like this
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13
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15
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17
Find the elapsed time from 7:45 A.M. to 3:05 P.M.
Think about it like a subtraction problem.
Just remember:
- 1 hour is equal to 60 minutes. So when you
regroup, you need to add 60 to the total number of
minutes, not 10 as you may be used to doing.
- Add 12 to the p.m. time to get your
military time. So in this problem 3:05 pm
becomes 15:05
For more practice go to
http://www.quia.com/rr/6373.html
```