Elapsed Time Practice

Front

What is elapsed time?

Back

Elapsed time is the amount of time that passes from the start of an event to the end of that event.

Front

How do you calculate elapsed time when given a start and end time?

Back

To calculate elapsed time, subtract the start time from the end time. If the times are on different hours, account for the hour difference.

Front

What is the difference between AM and PM in time notation?

Back

AM refers to the time from midnight to noon, while PM refers to the time from noon to midnight.

Front

If an event starts at 2:15 PM and ends at 3:18 PM, how do you find the duration?

Back

Break it down: from 2:15 to 3:00 is 45 minutes, and from 3:00 to 3:18 is 18 minutes. Add them together for a total of 63 minutes.

Front

What is the duration of an event that starts at 11:30 AM and ends at 12:25 PM?

Back

The duration is 55 minutes.

Front

How do you convert minutes into hours and minutes?

Back

Divide the total minutes by 60 to find the hours. The remainder is the minutes.

Front

What is the duration of a lunch period that starts at 12:45 PM and ends at 1:15 PM?

Back

The duration is 30 minutes.

Front

How can you visualize elapsed time on a number line?

Back

You can represent the start time and end time on a number line, marking the intervals to see the total elapsed time.

Front

What is a common mistake when calculating elapsed time?

Back

A common mistake is forgetting to account for the transition between AM and PM or not properly adding minutes across the hour.

Front

If Jennifer practices flute from 4:05 to 4:47, how do you calculate the time?

Back

From 4:05 to 4:40 is 35 minutes, and from 4:40 to 4:47 is 7 minutes. Add them for a total of 42 minutes.