Calculating Elapsed Time with Number Lines

Mr. Schneider explains how to calculate elapsed time using a number line. He starts by defining start and end times, then demonstrates adding minutes and hours to find the total elapsed time. The video concludes with tips for improving calculation speed.

What time did Mr. Schneider start his laundry?

• 9:00 a.m.

• 10:00 a.m.

• 9:30 a.m.

• 11:15 a.m.

What is the first thing you should do when calculating elapsed time?

• Find the end time

• Draw a number line

• Add the hours

• Find the start time

What is the definition of elapsed time?

• The time shown on a clock

• The time it takes to complete a task

• The time between the start and end of an event

• The time it takes to travel a distance

What was the end time for Mr. Schneider's laundry task?

• 12:00 p.m.

• 11:15 a.m.

• 10:30 a.m.

• 10:00 a.m.

What is the purpose of labeling the start and end times on a number line?

• To add more numbers

• To help visualize the elapsed time

• To make it look neat

• To confuse the viewer

How many minutes did Mr. Schneider add first to reach 10:00 a.m.?

• 30 minutes

• 60 minutes

• 15 minutes

• 45 minutes

What is the first step in using a number line to calculate elapsed time?

• Add hours first

• Add minutes first

• Draw the number line

• Label the end time

After reaching 10:00 a.m., how many more minutes did Mr. Schneider add to match the minutes?

• 25 minutes

• 20 minutes

• 15 minutes

• 10 minutes

What should you do after matching the minutes on a number line?

• Add more minutes

• Add hours until you reach the end time

• Start over

• Subtract minutes

What is the total elapsed time for Mr. Schneider's laundry task?

• 1 hour and 45 minutes

• 1 hour and 30 minutes

• 2 hours

• 1 hour and 15 minutes