NC.4.MD.8

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?

Back

To calculate elapsed time, subtract the start time from the end time.

Front

If a movie starts at 2:10 and ends at 4:40, how do you find out how long it lasts?

Back

Subtract 2:10 from 4:40. The movie lasts 2 hours and 30 minutes.

Front

What is the difference between hours and minutes?

Back

1 hour equals 60 minutes.

Front

How do you convert minutes to hours?

Back

Divide the number of minutes by 60 to convert to hours.

Front

If snack time is at 9:50 am and lunch is at 12:05 pm, how do you find the waiting time?

Back

Subtract 9:50 from 12:05 to find the waiting time of 2 hours and 15 minutes.

Front

What is the starting time if an activity lasts 1 hour and 45 minutes and ends at 3:15 pm?

Back

Subtract 1 hour and 45 minutes from 3:15 pm to find the starting time of 1:30 pm.

Front

How do you determine the end time of an event?

Back

Add the duration of the event to the start time to find the end time.

Front

If a baseball game lasts 3 hours and 5 minutes and starts at 7:30 pm, what time does it end?

Back

Add 3 hours and 5 minutes to 7:30 pm to find the end time of 10:35 pm.

Front

What is the duration of a play that starts at 1:15 pm and ends at 3:30 pm?

Back

The play lasts 2 hours and 15 minutes.