To find the elapsed time, we need to calculate how much time passes between the "Start Time" and the "End Time" for each problem.
Here is the step-by-step calculation for each one:
1. Start Time: 1:15 a.m. | End Time: 2:30 p.m.
* From 1:15 a.m. to 1:15 p.m. is exactly
12 hours.
* From 1:15 p.m. to 2:15 p.m. is
1 hour. (Total so far: 13 hours)
* From 2:15 p.m. to 2:30 p.m. is
15 minutes.
* Total: 13 hours + 15 minutes =
13 hours 15 minutes
2. Start Time: 9:30 a.m. | End Time: 11:15 p.m.
* From 9:30 a.m. to 9:30 p.m. is exactly
12 hours.
* From 9:30 p.m. to 10:30 p.m. is
1 hour. (Total so far: 13 hours)
* From 10:30 p.m. to 11:15 p.m. is
45 minutes.
* Total: 13 hours + 45 minutes =
13 hours 45 minutes
3. Start Time: 8:15 a.m. | End Time: 11:30 p.m.
* From 8:15 a.m. to 8:15 p.m. is exactly
12 hours.
* From 8:15 p.m. to 11:15 p.m. is
3 hours. (Total so far: 15 hours)
* From 11:15 p.m. to 11:30 p.m. is
15 minutes.
* Total: 15 hours + 15 minutes =
15 hours 15 minutes
4. Start Time: 8:45 a.m. | End Time: 10:30 p.m.
* From 8:45 a.m. to 8:45 p.m. is exactly
12 hours.
* From 8:45 p.m. to 9:45 p.m. is
1 hour. (Total so far: 13 hours)
* From 9:45 p.m. to 10:30 p.m. is
45 minutes.
* Total: 13 hours + 45 minutes =
13 hours 45 minutes
Final Answer:
1. 13 hours 15 minutes
2. 13 hours 45 minutes
3. 15 hours 15 minutes
4. 13 hours 45 minutes
Parent Tip: Review the logic above to help your child master the concept of elapsed time word problems 5th grade worksheet.
