Converting Time and Calculating Time
Learn how to convert time between hours, minutes, and seconds, and add or subtract time. Let’s get started! 🚀
Video Lesson
Watch and learn the basics
Flashcards
Review key concepts visually
%20Converting%20Units%20of%20Time.webp)
%20Examples%20on%20Converting%20Units%20of%20Time.webp)
%20Adding%20Time.webp)
%20Subtracting%20Time.webp)
🛎️ What are Units of Time?
- Time is measured in seconds (s), minutes (min), hours (h), and days.
- The conversion rates you must know: 60 s = 1 min, 60 min = 1 h, and 24 h = 1 day.
🛎️ How to Convert Units of Time?
- Converting to a smaller unit means multiplying; converting to a larger unit means dividing.
- For example, 2 h = 120 min (×60) and 300 s = 5 min (÷60).
🛎️ How to Add Time?
- Add minutes and seconds separately.
- If seconds are 60 or more, convert 60 s into 1 min.
🛎️ How to Subtract Time?
- Subtract minutes and seconds separately.
- If there are not enough seconds, exchange 1 min for 60 s first.
Practice Questions
Test your understanding
How many minutes are in 2 hours?
Correct! 🎉 +10 pointsNot quite right
There are 60 minutes in 1 hour, so 2 hours × 60 = 120 minutes.
Convert 180 seconds into minutes.
Correct! 🎉 +10 pointsNot quite right
There are 60 seconds in 1 minute. Divide 180 by 60: minutes.
Convert 2 days and 6 hours into just hours.
Correct! 🎉 +20 pointsNot quite right
Each day has 24 hours, so 2 days equals 48 hours. Adding 6 hours gives a total of 54 hours.
How many minutes are there in 2 hours and 30 minutes?
Correct! 🎉 +20 pointsNot quite right
Two hours equals 120 minutes, and adding 30 minutes gives a total of 150 minutes.
A movie lasts for 2 hours and 15 minutes. How many minutes is that in total?
Correct! 🎉 +20 pointsNot quite right
Each hour has 60 minutes, so 2 hours equals 120 minutes. Adding 15 minutes gives a total of 135 minutes.
Subtract 15 minutes and 30 seconds from 45 minutes and 20 seconds.
Correct! 🎉 +30 pointsNot quite right
Subtract 15 minutes from 45 minutes, leaving 30 minutes. Since 20 seconds is smaller than 30 seconds, borrow 1 minute, reducing the minutes to 29. Now subtract 30 seconds from 80 seconds, giving 50 seconds. The final answer is 29 minutes and 50 seconds.
Want to see the full working?
Interactive Activity
Converting time units and time calculation steps.
Loading interactive widget...
Click here to open ChatCat