Elapsed Time Examples in Math
Start with the recap, study the fully worked examples, then use the practice problems to check your understanding of Elapsed Time.
This page combines explanation, solved examples, and follow-up practice so you can move from recognition to confident problem-solving in Math.
Concept Recap
Calculating the amount of time that passes between a start time and an end time.
Imagine a movie starts at 2:15 PM and ends at 4:45 PM. Elapsed time is like counting how many minutes the movie lasted—you hop forward from the start time to the end time.
Read the full concept explanation →How to Use These Examples
- Read the first worked example with the solution open so the structure is clear.
- Try the practice problems before revealing each solution.
- Use the related concepts and background knowledge badges if you feel stuck.
What to Focus On
Core idea: Elapsed time measures the duration between two points in time, found by counting forward or subtracting.
Common stuck point: Crossing the hour boundary (e.g., from 10:45 to 11:20) requires careful counting since minutes reset at 60, not 100.
Sense of Study hint: Count forward from the start time: first jump to the next full hour, then add the remaining minutes to the end time.
Worked Examples
Example 1
easySolution
- 1 Start time: 8:00 AM. End time: 3:00 PM.
- 2 From 8:00 AM to 12:00 PM = 4 hours.
- 3 From 12:00 PM to 3:00 PM = 3 hours.
- 4 Total elapsed time: \(4 + 3 = 7\) hours.
Answer
Example 2
mediumPractice Problems
Try these problems on your own first, then open the solution to compare your method.
Example 1
easyExample 2
mediumRelated Concepts
Background Knowledge
These ideas may be useful before you work through the harder examples.