Calculating Elapsed Time Concepts

The video tutorial explains how to calculate elapsed time and estimate time duration using various examples. It covers the concept of elapsed time, provides a detailed explanation of how to calculate it using a number line and subtraction method, and demonstrates these methods through practical examples such as cleaning, washing clothes, studying, and tutoring. The tutorial also includes a brief review of time concepts like hours, minutes, and seconds, and explains the difference between AM and PM.

What is the definition of elapsed time?

• The time shown on a clock

• The time it takes to travel a distance

• The time it takes to complete a task

• The time from the start to the end of an event

What does 'AM' stand for in time notation?

• After Morning

• After Midnight

• Ante Morning

• Ante Meridian

How many minutes are there in one hour?

• 30 minutes

• 45 minutes

• 90 minutes

• 60 minutes

When using the number line method, what is the first step?

• Add the start and end times

• Subtract the start time from the end time

• Draw a line and mark the start time

• Estimate the end time

In the subtraction method, what should you do if the minutes in the end time are smaller than the start time?

• Add 12 hours to the end time

• Borrow an hour from the end time

• Add 60 to the end time minutes

• Subtract directly

How do you estimate elapsed time?

• By adding 10 minutes to the start time

• By rounding off the minutes

• By subtracting the start time from the end time

• By rounding off the hours

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

• 45 minutes

• 1 hour

• 53 minutes

If Jeff starts studying at 9:17 AM and finishes at 10:35 AM, how long does he study?

• 1 hour and 15 minutes

• 1 hour and 25 minutes

• 1 hour and 20 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?

• Add 12 hours to the start time

• Subtract directly

• Use the number line method

• Add 12 hours to the end time