Solving Elapsed Time Problems with a Number-Line

What time did Marshall leave school?

• 4:50 a.m.

• 3:00 p.m.

• 2:45 p.m.

• 6:30 p.m.

What is the first step in solving an elapsed time problem?

• Find the ending time

• Calculate the total hours

• Identify the starting time

• Add the minutes

How long was the period from when Marshall left school to when he ate dinner?

• 3 hours and 45 minutes

• 3 hours and 15 minutes

• 4 hours

• 3 hours

What is the total elapsed time for Marshall's after-school activities?

• 2 hours and 45 minutes

• 3 hours

• 3 hours and 45 minutes

• 4 hours

How do you calculate the minutes part of the elapsed time?

• Subtract the start time from the end time

• Count the minutes from the start time to the end time directly

• Find the difference between the minutes at the start and next hour

• Add the minutes from start and end time

What additional step is necessary when the elapsed time crosses into a new hour?

• Subtract an hour from the total

• Reset the minutes to zero

• Calculate the minutes separately and add to the hours

• Add 60 minutes to the minutes part

At what time did Amanda leave for South Carolina?

• 6:30 p.m.

• 9:20 p.m.

• 4:50 p.m.

• 4:50 a.m.

How many hours did Amanda's drive take?

• 16 hours

• 12 hours

• 4 hours

• 16 hours and 30 minutes

What was the purpose of calculating the time from 4:55 to 5:00 in Amanda's problem?

• To find the starting minute

• To adjust for daylight savings

• To round up the hours

• To complete the hour before adding full hours

Why is it important to understand elapsed time?

• To calculate distances

• All of the above

• To manage daily schedules effectively

• To improve mathematical skills