Calculating Elapsed Time with T-charts

Mrs. Mallet explains how to calculate elapsed time using a T-chart. She defines elapsed time as the duration between a start and end time. The video demonstrates setting up a T-chart, labeling it with time, hours, and minutes, and performing calculations to find the elapsed time. The example used is from 2:35 to 5:25, resulting in an elapsed time of 2 hours and 50 minutes. The video concludes with a summary of the process and encourages viewers to apply the method to other problems.

What is the main goal of this lesson?

• To practice addition and subtraction.

• To learn how to calculate elapsed time using a T-chart.

• To understand the history of timekeeping.

• To explore different types of charts.

What does the term 'elapsed' refer to?

• The time it takes to start an activity.

• The time spent doing an activity from start to finish.

• The time remaining after an activity ends.

• The time it takes to plan an activity.

What is the first step in setting up a T-chart for elapsed time?

• Labeling the sides with 'Start' and 'End'.

• Writing down the start time.

• Calculating the total time.

• Drawing a big 'T' on the paper.

How do you move from 2:35 to 2:45 on the T-chart?

• By adding 5 minutes.

• By adding 15 minutes.

• By adding 10 minutes.

• By adding 20 minutes.

What is the next step after reaching 3:00 on the T-chart?

• Add 30 minutes to reach 3:30.

• Add 25 minutes to reach 3:25.

• Add 1 hour to reach 4:00.

• Add 2 hours to reach 5:00.

How many hours are added to go from 3:00 to 5:00?

• 4 hours

• 3 hours

• 2 hours

• 1 hour

What is the final step to reach the end time of 5:25?

• Add 20 minutes.

• Add 10 minutes.

• Add 25 minutes.

• Add 15 minutes.

How do you calculate the total elapsed time?

• By multiplying the hours by the minutes.

• By dividing the total minutes by 60.

• By subtracting the start time from the end time.

• By adding all the hours and minutes separately.

What is the total elapsed time from 2:35 to 5:25?

• 3 hours

• 2 hours and 50 minutes

• 2 hours and 45 minutes

• 2 hours and 30 minutes

Why is it important not to mix units when calculating elapsed time?

• It is a requirement of the T-chart method.

• It helps in understanding the concept better.

• It makes the process faster.

• It can lead to incorrect calculations.