Elapsed Time Math Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
School starts at 8:00 AM and ends at 3:00 PM. How long is the school day?

Solution

  1. 1
    Start time: 8:00 AM. End time: 3:00 PM.
  2. 2
    From 8:00 AM to 12:00 PM = 4 hours.
  3. 3
    From 12:00 PM to 3:00 PM = 3 hours.
  4. 4
    Total elapsed time: \(4 + 3 = 7\) hours.

Answer

7 hours
Elapsed time = end time − start time. Going from 8 AM to 3 PM spans 7 hours.

About Elapsed Time

Calculating the amount of time that passes between a start time and an end time, using hours and minutes in base-60 arithmetic rather than base-10.

Learn more about Elapsed Time →

More Elapsed Time Examples

Example 2 medium

A movie starts at 2:15 PM and lasts 1 hour and 45 minutes. What time does it end?

Example 3 easy

A TV show starts at 7:30 PM and ends at 8:00 PM. How long is the show?

Example 4 medium

Lena starts reading at 4:20 PM and reads for 55 minutes. What time does she stop?

← All Elapsed Time Examples Elapsed Time Concept

Related Concepts

Telling TimeSubtraction