Measuring Elapsed Time with Open Number Lines

This video tutorial teaches how to find elapsed time using a number line. It begins with an introduction to key vocabulary, such as elapsed time, minutes, and hours. The tutorial then explains how to use a number line to measure elapsed time by counting intervals of one hour, ten minutes, and one minute. A story problem is used to demonstrate the process, showing how to calculate the elapsed time between a start and end time. The video concludes with a summary of the lesson.

What does 'elapsed time' refer to?

• The time when an activity ends

• The amount of time from the start to the end of an activity

• The time it takes to start an activity

• The time displayed on a clock

How many seconds are there in one minute?

• 100 seconds

• 120 seconds

• 60 seconds

• 30 seconds

What is the equivalent of one hour in minutes?

• 120 minutes

• 30 minutes

• 60 minutes

• 100 minutes

In the video, how is an hour visually represented on a number line?

• As a small rock

• As a medium-sized hill

• As a big pointy mountain

• As a large tree

What visual representation is used for ten minutes on the number line?

• A small rock

• A medium-sized hill

• A large tree

• A big pointy mountain

What interval does the number line NOT use for measuring elapsed time?

• One hour

• One minute

• Ten minutes

• Five minutes

At what time did Jake start his soccer practice?

• 4:00 p.m.

• 4:30 p.m.

• 4:10 p.m.

• 4:20 p.m.

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

• Adding ten-minute intervals

• Calculating the total hours

• Labeling the start and end times

• Adding one-minute intervals

Why can't more ten-minute intervals be added after reaching 4:50 p.m. in the story problem?

• It would exceed the end time

• It's not allowed on a number line

• Ten-minute intervals are only for starting times

• It would not accurately measure elapsed time

How long was Jake at soccer practice?

• 42 minutes

• 32 minutes

• 52 minutes

• 62 minutes