Understanding Time

Hello, Year 6! Today, we’re going to learn how to calculate time. Time is something we use every day, whether we’re getting ready for school, planning our activities, or watching our favourite shows.

What is Time?

Time helps us understand when things happen. We usually measure time in hours and minutes. Here’s how it works:

  • 1 hour = 60 minutes
  • 1 minute = 60 seconds

Reading the Clock

There are two types of clocks:

  1. Analogue Clock: Has hour and minute hands.
  2. Digital Clock: Shows time in numbers, like 10:30.

Key Rules for Calculating Time

  1. Adding Time:
    • When you add hours and minutes, remember to convert minutes over 60 into hours.
    • Example: 2 hours and 50 minutes + 1 hour and 20 minutes.
      • First, add the hours: 2 + 1 = 3 hours.
      • Next, add the minutes: 50 + 20 = 70 minutes.
      • Since 70 minutes is more than 60, convert it:
        • 70 minutes – 60 minutes = 10 minutes and add 1 hour.
        • So, 3 + 1 = 4 hours and 10 minutes.
      • Final answer: 4 hours and 10 minutes.
  2. Subtracting Time:
    • When you subtract time, if minutes go below zero, borrow 1 hour.
    • Example: 3 hours and 15 minutes – 1 hour and 50 minutes.
      • Subtract the hours: 3 – 1 = 2 hours.
      • Subtract the minutes: 15 – 50.
      • Since 15 is less than 50, we need to borrow 1 hour (which is 60 minutes).
      • So, 15 + 60 = 75 minutes.
      • Now, subtract: 75 – 50 = 25 minutes.
      • Combine: 2 hours – 1 hour (that we borrowed) = 1 hour and 25 minutes.
      • Final answer: 1 hour and 25 minutes.

Tips and Tricks

  • Always convert minutes over 60 into hours when adding.
  • When subtracting, if minutes are less than zero, borrow an hour.
  • Practice makes perfect! Try using a clock at home to see how long activities take.

Questions

Easy Level Questions

  1. What is 1 hour and 30 minutes + 30 minutes?
  2. If it is 2:00 PM, what time will it be in 2 hours?
  3. How many minutes are there in 2 hours?
  4. What time is it 1 hour after 3:30 PM?
  5. If you start homework at 4:00 PM and work for 1 hour, what time is it when you finish?
  6. What is 1 hour and 15 minutes + 15 minutes?
  7. If it is 5:20 PM now, what time will it be in 40 minutes?
  8. How many minutes are in 3 hours?
  9. If you wake up at 7:00 AM and take 1 hour to get ready, what time do you leave?
  10. What time is it 30 minutes after 6:00 PM?
  11. If a movie starts at 5:00 PM and lasts for 2 hours, what time does it end?
  12. What is 2:30 PM + 1 hour?
  13. If I leave school at 3:15 PM and walk home for 30 minutes, what time do I get home?
  14. What is 1 hour after 12:00 PM?
  15. How many seconds are there in a minute?
  16. What is 4:00 PM – 1 hour?
  17. If it is 8:00 AM now, what time will it be in 3 hours?
  18. If a train leaves at 9:00 AM and takes 1 hour 45 minutes, what time does it arrive?
  19. What is 2 hours + 30 minutes?
  20. If dinner is at 6:30 PM and it takes 1 hour to cook, what time should you start cooking?

Medium Level Questions

  1. What is 3 hours and 45 minutes + 2 hours and 30 minutes?
  2. If it is 7:15 PM now, what time will it be in 1 hour and 45 minutes?
  3. How many minutes are there in 5 hours?
  4. If a class starts at 1:00 PM and lasts for 1 hour and 50 minutes, what time does it end?
  5. What is 4:25 PM – 1 hour and 15 minutes?
  6. If I start a game at 5:30 PM and play for 2 hours, what time will I finish?
  7. What is the time 2 hours and 15 minutes after 10:45 AM?
  8. If I have 90 minutes to finish my homework and I start at 4:00 PM, what time will I finish?
  9. What is 2 hours and 50 minutes – 1 hour and 20 minutes?
  10. If I go to bed at 10:30 PM and wake up at 7:00 AM, how many hours did I sleep?
  11. How many minutes are in 2 hours and 30 minutes?
  12. If a train departs at 10:00 AM and arrives at 1:15 PM, how long is the journey?
  13. What is the time 1 hour and 50 minutes after 11:05 AM?
  14. If a marathon takes 3 hours and 20 minutes to complete, what time will it finish if it starts at 9:00 AM?
  15. If I read for 45 minutes, take a break for 15 minutes, and then read again for 30 minutes, how long did I read in total?
  16. What is 1 hour and 35 minutes – 45 minutes?
  17. If a bus leaves at 2:30 PM and reaches its destination at 3:45 PM, how long did the journey take?
  18. How many seconds are there in 3 minutes?
  19. If I have 2 hours and 10 minutes and I spend 1 hour and 20 minutes, how much time do I have left?
  20. If a class lasts for 2 hours and starts at 9:15 AM, what time does it end?

Hard Level Questions

  1. What is 5 hours and 50 minutes + 3 hours and 15 minutes?
  2. If it is 9:30 PM now, what time will it be in 4 hours and 45 minutes?
  3. How many minutes are there in 7 hours and 20 minutes?
  4. If a movie starts at 6:00 PM and runs for 3 hours and 10 minutes, what time does it end?
  5. What is 7:45 PM – 2 hours and 30 minutes?
  6. If I exercise for 1 hour and 25 minutes and then take a shower for 30 minutes, how much time have I spent?
  7. What is the time 3 hours and 40 minutes after 12:50 PM?
  8. If I start studying at 3:15 PM and study for 1 hour and 45 minutes, what time will it be when I finish?
  9. What is 6 hours and 15 minutes – 3 hours and 35 minutes?
  10. If I go to a concert that starts at 8:00 PM and lasts 2 hours and 30 minutes, what time does it finish?
  11. How many seconds are there in 5 minutes and 30 seconds?
  12. If a train journey takes 2 hours and 55 minutes and starts at 11:15 AM, what time does it arrive?
  13. What is 1 hour and 10 minutes added to 2 hours and 50 minutes?
  14. If I have 4 hours and 30 minutes and I spend 2 hours and 15 minutes, how much time do I have left?
  15. If a meeting starts at 9:00 AM and lasts 1 hour and 20 minutes, what time does it end?
  16. How long is it from 8:25 AM to 9:45 AM?
  17. If I finish a project at 5:00 PM after working on it for 2 hours and 15 minutes, what time did I start?
  18. If I have 3 hours and 40 minutes to complete my homework and I take 1 hour and 20 minutes, how much time is left?
  19. What is the time 4 hours and 20 minutes after 6:15 PM?
  20. If a task takes 1 hour and 45 minutes and I start it at 2:30 PM, what time will I finish?

Answers

Easy Level Answers

  1. 2 hours
  2. 4:00 PM
  3. 120 minutes
  4. 4:30 PM
  5. 5:00 PM
  6. 1 hour and 30 minutes
  7. 6:00 PM
  8. 180 minutes
  9. 8:00 AM
  10. 6:30 PM
  11. 7:00 PM
  12. 3:30 PM
  13. 3:45 PM
  14. 1:00 PM
  15. 60 seconds
  16. 3:00 PM
  17. 11:00 AM
  18. 7:45 PM
  19. 2 hours
  20. 5:30 PM

Medium Level Answers

  1. 6 hours and 15 minutes
  2. 9:00 PM
  3. 300 minutes
  4. 2:50 PM
  5. 3:10 PM
  6. 7:30 PM
  7. 1:00 PM
  8. 5:30 PM
  9. 1 hour and 30 minutes
  10. 8 hours and 30 minutes
  11. 150 minutes
  12. 3:15 PM
  13. 12:55 PM
  14. 11:15 PM
  15. 90 minutes
  16. 15 minutes
  17. 1 hour and 15 minutes
  18. 3 hours
  19. 1 hour and 35 minutes
  20. 11:15 AM

Hard Level Answers

  1. 9 hours and 5 minutes
  2. 2:15 AM
  3. 440 minutes
  4. 9:10 PM
  5. 7:15 PM
  6. 1 hour and 55 minutes
  7. 4:30 PM
  8. 5:00 PM
  9. 2 hours and 40 minutes
  10. 10:30 PM
  11. 330 seconds
  12. 2:10 PM
  13. 3 hours
  14. 2 hours and 15 minutes
  15. 10:20 AM
  16. 1 hour and 20 minutes
  17. 2:45 PM
  18. 2 hours and 20 minutes
  19. 10:35 PM
  20. 4:15 PM

Great job, Year 6! Now you know how to calculate time! Keep practicing, and you’ll become a time expert in no time!