The video tutorial explains how to calculate elapsed time and estimate time duration. It provides examples of daily activities like cleaning, washing clothes, studying, and tutoring to demonstrate the calculation of elapsed time using both a number line and subtraction method. The tutorial also covers rounding off times for estimation and explains the concepts of AM and PM.

What is the definition of elapsed time?

• The time taken to prepare for a task

• The time taken to complete a task

• The time taken from the start to the end

• The time taken from the end to the start

What does AM stand for?

• After Midnight

• Ante Meridian

• After Meridian

• Ante Midnight

How many minutes are there in one hour?

• 30 minutes

• 45 minutes

• 60 minutes

• 90 minutes

Using the number line method, how many minutes are there from 7:32 AM to 7:35 AM?

• 2 minutes

• 3 minutes

• 4 minutes

• 5 minutes

When using subtraction to find elapsed time, what should you do if the minutes in the end time are smaller than the start time?

• Add an hour to the start time

• Subtract an hour from the end time

• Borrow an hour from the end time

• Add an hour to the end time

How do you estimate elapsed time?

• By rounding off the minutes

• By subtracting 10 minutes

• By rounding off the hours

• By adding 10 minutes

If the start time is 9:17 AM and the end time is 10:35 AM, what is the estimated elapsed time?

• 1 hour and 25 minutes

• 1 hour and 18 minutes

• 1 hour and 20 minutes

• 1 hour and 15 minutes

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

• Add 12 hours to the start time

• Add 12 hours to the end time

• Subtract 12 hours from the end time

• Subtract 12 hours from the start time

In the final example, how many hours does Chris work as a tutor per day?

• 4 hours

• 3 hours

• 5 hours

• 2 hours

What is the total elapsed time if you add 1 hour to 10 AM, then another hour, and another hour?

• 2 hours

• 3 hours

• 5 hours

• 4 hours