Calculating Elapsed Time

The video tutorial introduces the concept of elapsed time, explaining how to calculate it using two methods: a number line and subtraction. It provides examples to illustrate the calculation of both exact and estimated elapsed times. The tutorial also covers time components such as hours, minutes, and seconds, and explains the difference between AM and PM. By the end, students should understand how to determine elapsed time in various scenarios.

What is the definition of elapsed time?

• The time taken from the start time to the end time

• The time taken from noon to midnight

• The time taken from midnight to noon

• The time taken from the end time to the start time

How can elapsed time be calculated using a number line?

• By counting the number of seconds between start and end time

• By counting the number of days between start and end time

• By counting the number of minutes between start and end time

• By counting the number of hours between start and end time

What is the first step in calculating elapsed time using subtraction?

• Multiply the start time by the end time

• Divide the start time by the end time

• Add the start time to the end time

• Subtract the start time from the end time

How do you estimate elapsed time?

• By rounding off the hours

• By rounding off the days

• By rounding off the seconds

• By rounding off the minutes

What is the estimated elapsed time if the start time is 7:32 AM and the end time is 8:25 AM?

• 1 hour and 10 minutes

• 53 minutes

• 1 hour

• 45 minutes

If Alison starts washing clothes at 4:28 PM and finishes at 5:09 PM, what is the exact elapsed time?

• 40 minutes

• 41 minutes

• 39 minutes

• 42 minutes

What is the estimated elapsed time for Jeff's study session from 9:17 AM to 10:35 AM?

• 1 hour and 15 minutes

• 1 hour and 20 minutes

• 1 hour and 25 minutes

• 1 hour and 18 minutes

How long does Chris work as a tutor if he starts at 10 AM and ends at 1 PM?

• 5 hours

• 2 hours

• 3 hours

• 4 hours

What should you do if the start time is AM and the end time is PM when calculating elapsed time?

• Subtract 12 hours from the end time

• Add 12 hours to the end time

• Subtract 12 hours from the start time

• Add 12 hours to the start time

What is the total elapsed time if the start time is 10 AM and the end time is 1 PM?

• 2 hours

• 5 hours

• 3 hours

• 4 hours