Time
Read clocks, calculate elapsed time, and work with time zones
Start with the basics and progress through 2 lessons. Each lesson builds on the previous one.
0 of 2 lessons done
Test Your Knowledge
10 questions, new mix each time (from 31)
In This Topic (2 lessons)
Telling Time
Learn how to read analog and digital clocks and understand hours, minutes, and seconds.
Elapsed Time
Learn to calculate how much time has passed between two events.
Understanding time involves reading clocks, calculating elapsed time, and converting between units. From scheduling appointments to calculating travel times, time skills are used daily. The 12-hour and 24-hour clock systems, time zones, and duration calculations are essential knowledge.
What You'll Learn
- Read analog and digital clocks
- Convert between 12-hour and 24-hour time
- Calculate elapsed time
- Convert between time units
- Solve time-related word problems
Frequently Asked Questions
How do I convert to 24-hour time?
For PM times, add 12 to the hour: 3:00 PM = 15:00. For AM times, keep the same hour: 9:00 AM = 09:00. Midnight is 00:00.
How do I calculate elapsed time?
Subtract the start time from the end time. For times crossing noon or midnight, break it into parts or convert to 24-hour time first.
What are the time unit conversions?
60 seconds = 1 minute, 60 minutes = 1 hour, 24 hours = 1 day, 7 days = 1 week.