Elapsed Time

Elapsed time is the amount of time that has passed between two specific points in time. It is often measured in hours, minutes, and seconds. Calculating elapsed time involves finding the difference between two given times.

Steps to Calculate Elapsed Time

1. Identify the starting time and the ending time.
2. Convert the times to the same units (hours, minutes, or seconds).
3. Subtract the starting time from the ending time to find the elapsed time.

Example:

Let's say the starting time is 3:45 PM and the ending time is 7:30 PM. We will calculate the elapsed time.

1. Identify the starting time and the ending time:
   • Starting time: 3:45 PM
   • Ending time: 7:30 PM
2. Convert the times to the same units (hours and minutes):
   • Starting time: 3:45 PM = 3:45
   • Ending time: 7:30 PM = 19:30 (in 24-hour format)
3. Subtract the starting time from the ending time to find the elapsed time:
   • 19:30 - 3:45 = 15:45 (elapsed time)

So, the elapsed time between 3:45 PM and 7:30 PM is 15 hours and 45 minutes.

Study Guide

Here are some key points to remember when dealing with elapsed time:

• Units of Time: Understand the relationship between hours, minutes, and seconds. 1 hour = 60 minutes, 1 minute = 60 seconds.
• Converting Time: Be able to convert between different units of time (e.g., hours to minutes, minutes to seconds).
• Subtraction: Practice subtracting times to find the elapsed time.
• Word Problems: Solve word problems that involve calculating elapsed time.

With these concepts in mind, you'll be well-equipped to tackle problems related to elapsed time.