To find the elapsed time, we calculate the difference between the Start Time and the End Time. Since the worksheet asks for the "Nearest Half Hour," we will round our answers to the nearest :00 or :30.
Here is the step-by-step calculation for each row:
1.
10:00 P.M. to 11:30 P.M.
* From 10:00 to 11:00 is 1 hour.
* From 11:00 to 11:30 is 30 minutes.
* Total:
1 hour and 30 minutes
2.
2:00 P.M. to 5:00 P.M.
* Count the hours: 3:00, 4:00, 5:00.
* Total:
3 hours
3.
12:30 P.M. to 7:00 P.M.
* From 12:30 to 6:30 is 6 hours.
* From 6:30 to 7:00 is 30 minutes.
* Total:
6 hours and 30 minutes
4.
4:00 A.M. to 11:00 A.M.
* Count the hours: 5, 6, 7, 8, 9, 10, 11.
* Total:
7 hours
5.
3:00 P.M. to 9:30 P.M.
* From 3:00 to 9:00 is 6 hours.
* From 9:00 to 9:30 is 30 minutes.
* Total:
6 hours and 30 minutes
6.
4:30 P.M. to 6:00 P.M.
* From 4:30 to 5:30 is 1 hour.
* From 5:30 to 6:00 is 30 minutes.
* Total:
1 hour and 30 minutes
7.
12:00 A.M. to 12:00 P.M.
* This represents midnight to noon. There are 12 hours in that span.
* Total:
12 hours
8.
1:00 P.M. to 1:30 P.M.
* The hour stays the same, only the minutes change from 00 to 30.
* Total:
30 minutes
Final Answer:
1. 1 hour and 30 minutes
2. 3 hours
3. 6 hours and 30 minutes
4. 7 hours
5. 6 hours and 30 minutes
6. 1 hour and 30 minutes
7. 12 hours
8. 30 minutes
Parent Tip: Review the logic above to help your child master the concept of time elapsed worksheet 3rd.
