Time differences in minutes — Mental Maths Mastery

How to do it in your head

Jump to the hour — “count to the next o’clock, then whole hours, then the minutes”

1. From the start time, count minutes to the next o’clock.
2. Count the whole hours and turn them into minutes (× 60).
3. Add the minutes after the last o’clock, then add all the parts.

Use it for: Train and bus times, film lengths, match times and homework planning.

Worked example: A film starts at 2:45 and ends at 5:10. How many minutes long is the film? → 145

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

🏁 Lesson 17 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the ⏰ Clock Master badge when you pass — and a certificate when you finish all 6 lessons of Part 3 · Mental maths for daily life. You can still take the test without signing in.

🖨️ Time Difference Worksheet for Class 4 and 5

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)