Real-world examples of elapsed time on a number line (Grade 3)

📚 Quick Study Guide

• 🔢 Elapsed time is the amount of time that passes from the start to the end of an event.
• 📏 A number line can be used to visualize elapsed time. Each jump on the number line represents a unit of time (e.g., minutes, hours).
• ⏱️ To find the elapsed time, start at the beginning time on the number line and count the jumps until you reach the ending time.
• ➕ Each jump represents adding time. For example, if each jump is 5 minutes, then three jumps would be $5 + 5 + 5 = 15$ minutes.
• 💡 It's helpful to break down the time into smaller, manageable chunks (e.g., hours, half-hours, 15-minute intervals, 5-minute intervals, and single minutes).
• 📅 Remember to pay attention to AM and PM when dealing with time that spans across noon or midnight.

⏱️ Practice Quiz

1. What is the elapsed time from 2:00 PM to 2:30 PM?
   1. 15 minutes
   2. 20 minutes
   3. 30 minutes
   4. 45 minutes
2. A movie starts at 7:00 PM and ends at 9:00 PM. What is the elapsed time?
   1. 1 hour
   2. 1 hour 30 minutes
   3. 2 hours
   4. 2 hours 30 minutes
3. Sarah starts reading her book at 10:00 AM and reads until 10:45 AM. How long did she read?
   1. 30 minutes
   2. 40 minutes
   3. 45 minutes
   4. 1 hour
4. John begins his homework at 4:15 PM and finishes at 5:00 PM. What is the elapsed time?
   1. 30 minutes
   2. 45 minutes
   3. 1 hour
   4. 1 hour 15 minutes
5. Emily starts her walk at 8:00 AM and walks for 1 hour and 15 minutes. What time does she finish her walk?
   1. 8:45 AM
   2. 9:00 AM
   3. 9:15 AM
   4. 9:30 AM
6. A train departs at 11:30 AM and arrives at 12:00 PM. How long was the train ride?
   1. 15 minutes
   2. 20 minutes
   3. 30 minutes
   4. 45 minutes
7. What is the elapsed time from 1:00 PM to 3:00 PM?
   1. 1 hour
   2. 1 hour 30 minutes
   3. 2 hours
   4. 2 hours 30 minutes