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### Elapsed Time

```Date: 11/26/2002 at 15:23:37
From: Daniel
Subject: Measuring elapsed time

9 hours 02 minutes
- 6 hours 45 minutes
```

```
Date: 11/27/2002 at 14:26:23
From: Doctor Sarah
Subject: Re: Measuring elapsed time

Hi Daniel - thanks for writing to Dr. Math.

Let's look at the smaller number: 6 hrs. 45 min. Think of this as 6:45
or 45 minutes after six o'clock.

How long will it take to get to the next whole hour, seven o'clock
(7:00)?

15 more minutes, right?

How long is it from 7:00 to 9:02?

2 hours, 2 minutes.

Add the 15 minutes to the 2 hours, 2 minutes and you'll have an

It's easiest to do these problems looking at an analog clock. Here's a
picture of one, in case all of your clocks are digital:

- Doctor Sarah, The Math Forum
http://mathforum.org/dr.math/
```
Associated Topics:
Elementary Calendars/Dates/Time

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