Grade 3 Medium • Time & Measurement

Elapsed Time Word Problems & Clock Reading

Solve real-world elapsed time word problems calculating start times, finish times, and total duration in hours and minutes.

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🎯 Learning Objectives

Tell and write time to the nearest minute and measure time intervals in minutes; solve word problems involving addition and subtraction of time intervals.

📋 Curriculum Alignment

CCSS.MATH.CONTENT.3.MD.A.1

Use these curriculum references alongside your local grade-level expectations.

💡 Teaching & Parent Tips

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Comprehensive Lesson Guide: Elapsed Time Word Problems & Clock Reading

Mastering Elapsed Time with Open Number Lines

Elapsed time is notoriously tricky for elementary learners because time is based on base-60 (60 minutes per hour) rather than base-10.

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Recommended Strategy: The Mountain, Hill, and Rock Method

- Mountains: Jump by 1 hour (60 minutes).
- Hills: Jump by 10 or 15 minute increments to friendly numbers (e.g., quarter past or half past).
- Rocks: Jump by single minutes to reach the exact target time.

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Example:

- Scenario: Soccer practice began at 3:45 PM and finished at 5:10 PM. How long was practice?
- Jump 1: 3:45 to 4:00 PM (15 minutes).
- Jump 2: 4:00 to 5:00 PM (1 hour).
- Jump 3: 5:00 to 5:10 PM (10 minutes).
- Total: 1 hour and 25 minutes (85 minutes).

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