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Time Distance Speed

Time Distance Speed. Revision of Level 2 Time. Calculating Distance. Calculating Speed. www.mathsrevision.com. Calculating Time. Mixed Problems. Starter Questions. www.mathsrevision.com. Time. Revision of Level 2. Learning Intention. Success Criteria. To revise Level 2 work on Time.

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Time Distance Speed

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  1. Time Distance Speed Revision of Level 2 Time Calculating Distance Calculating Speed www.mathsrevision.com Calculating Time Mixed Problems Created by Mr. Lafferty Maths Dept.

  2. Starter Questions www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  3. Time Revision of Level 2 Learning Intention Success Criteria • To revise Level 2 work on Time. • 1. Convert 12hr to 24hr clock. • 2. Convert 24hr to 12hr clock. www.mathsrevision.com • 3. Count Method to find time intervals. Created by Mr. Lafferty Maths Dept.

  4. 12/24 Hour Clock midnight 1 am 2 am 3 am 4 am 5am 6 am 7 am 8 am 9 am 10 am 11 am 0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 midday 1 pm 2 pm 3 pm 4 pm 5 pm 6 pm 7 pm 8 pm 9 pm 10 pm 11 pm 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 Examples 9 pm becomes 8 pm becomes 6:30 pm becomes 11:30 pm becomes 4:20 pm becomes 3:10 pm becomes To go from 12 hour clock to 24 hour clock just add 12 to the pm hours: 2100 2000 1830 2330 1620 1510 Created by Mr. Lafferty Maths Dept.

  5. 12/24 Hour Clock midnight 1 am 2 am 3 am 4 am 5am 6 am 7 am 8 am 9 am 10 am 11 am 0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 midday 1 pm 2 pm 3 pm 4 pm 5 pm 6 pm 7 pm 8 pm 9 pm 10 pm 11 pm 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 Examples 2100 becomes 2000 becomes 1730 becomes 2208 becomes 2006 becomes 1350 becomes To go from 24 hour clock to 12 hour clock just subtract 12 from the hours if it is greater than 12: 9 pm 8 pm 5:30 pm 10:08 pm 8:06 pm 1:50 pm Created by Mr. Lafferty Maths Dept.

  6. Counting Method When working out time difference we will use the Counting Method. This method will always work. 60 mins = 1hr 3 hrs 6 mins Example : Find the time difference between 08 46 hrs and 11 52 hrs Hrs Mins nearest hour www.mathsrevision.com 08 46  09 00 14 hours 09 00  11 00 2 What’s left? + 11 00  11 52 52 2 66 Created by Mr. Lafferty Maths Dept.

  7. Counting Method Example : Find the time difference between 02 37 hrs and 23 49 hrs Hrs Mins nearest hour 02 37  03 00 23 hours 03 00  23 00 20 What’s left? + 23 00  23 49 49 www.mathsrevision.com 20 72 21hrs 12mins Created by Mr. Lafferty Maths Dept.

  8. Time Revision of Level 2 Now try Lifeskills Ex 1 & 2 Ch5 (page 40) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  9. Starter Questions 120o 70o 6x 4x 4x www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  10. Distance Working Out Distance Learning Intention Success Criteria • Understand the distance formula. • 1. We are learning how to work out simple distance. • 2. Apply the formula to calculate simple distance. www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  11. Distance Working out Distances Imagine you were travelling in a train at a steady speed of 80km/hr. In 1 hour you travel : 80 x 1 = 80 km In 2 hours you travel : 80 x 2 = 160 km In 3 hours you travel : 80 x 3 = 240 km www.mathsrevision.com Can you guess what the formula is : in symbols Created by Mr. Lafferty Maths Dept.

  12. Distance Example : A racing car travelled at 50 km/hr. What is the distance covered in 6 hours ? Working www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  13. Distance Now try Lifeskills Ex 3 Ch5 (page 42) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  14. Starter Questions www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  15. Speed Working Out Speed Learning Intention Success Criteria • Understand the speed formula. • 1. We are learning how to calculate simple speed. • 2. Apply the formula to calculate simple speed. www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  16. Speed Working Out Speed Imagine you sailed 45 kilometres between two islands and it took 3 hours. In 3 hours you travel : = 45 km In 1 hour you travel : 45 ÷ 3 = 15 km This means your speed is : 15km/hr www.mathsrevision.com Can you guess what the formula is : in symbols Created by Mr. Lafferty Maths Dept.

  17. Speed Example : Sean flies to Majorca on holiday , a distance of 2500km. It took 4hrs to get there. What was the plane’s average speed? Working www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  18. Speed Now try Lifeskills Ex 4 Ch5 (page 43) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  19. Starter Questions 4 cm www.mathsrevision.com 6cm Created by Mr. Lafferty Maths Dept.

  20. Time Working Out Time Learning Intention Success Criteria • Remember the time formula. • 1. We are learning how to calculate simple time. • 2. Apply the formula to calculate simple time. www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  21. Basic Fractional Hours You should already know : www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  22. Hrs Mins to Decimal Time Converting Hrs Mins to Decimal Time To convert minutes to decimal hours we simply divide minutes by 60. Example : 48 minutes to decimal is = 0.8 hr www.mathsrevision.com = 2.25 hr Example : 2hr 15 minutes to decimal is Created by Mr. Lafferty Maths Dept.

  23. Hrs Mins to Decimal Time Calculate the decimal hour value for minutes below. 9.75 hrs Convert 9 hrs 45 mins into hours 7.25 hrs Convert 7 hrs 15 mins into hours www.mathsrevision.com 6.5 hrs Convert 6 hrs 30 mins into hours Created by Mr. Lafferty Maths Dept.

  24. Hrs Mins to Decimal Time Converting Hrs Mins to Decimal Time Try and remember the more common decimal hours 6 mins → 0.1 hrs 12 mins → 0.2 hrs 18 mins → 0.3 hrs 24 mins → 0.4 hrs 30 mins → 0.5 hrs www.mathsrevision.com 36 mins → 0.6 hrs 42 mins → 0.7 hrs 48 mins → 0.8 hrs 54 mins → 0.9 hrs Created by Mr. Lafferty Maths Dept.

  25. Hrs Mins to Decimal Time Converting Hrs Mins to Decimal Time Calculate the decimal hour value for minutes below. 0.3hrs 0.7hrs 0.6hrs 0.5hrs 0.2hrs 0.1hrs www.mathsrevision.com 0.9hrs 0.4hrs Created by Mr. Lafferty Maths Dept.

  26. Hrs Mins to Decimal Time Converting Decimal Time to Hrs Mins You should already know : To change minutes to a decimal time ‘divide by 60’ www.mathsrevision.com To convert back to and minutes we do the opposite : To change decimal time to minutes ‘multiply by 60’ Created by Mr. Lafferty Maths Dept.

  27. Hrs Mins to Decimal Time Converting Decimal Time to Hrs Mins To change decimal time to minutes ‘multiply by 60’ Example : 0.7 hrs to minutes is = 42 mins www.mathsrevision.com 3.4 hrs to hours and minutes is Example : = 3 hrs 24 mins Created by Mr. Lafferty Maths Dept.

  28. Decimal Time to Hrs Mins Calculate the hours and minutes for theses decimal hours 3hrs 30mins 4hr 15mins www.mathsrevision.com 6hrs 45mins Created by Mr. Lafferty Maths Dept.

  29. Hrs Mins to Decimal Time Converting Decimal Time to Hrs Mins Calculate the hours and minutes for theses decimal hours 4hrs 42mins 1hr 48mins 4hrs 36mins www.mathsrevision.com 1hr 24mins 3hrs 18mins Created by Mr. Lafferty Maths Dept.

  30. Time Working Out Time Imagine you flew 800 miles to Paris and the average speed of the plane was 200 miles/hr. To travel 200 miles takes 1 hour : To travel 800 miles takes : 800 ÷ 200 = 4 hours www.mathsrevision.com Can you guess what the formula is : in symbols Created by Mr. Lafferty Maths Dept.

  31. Time Ex : Tony ran 400 metres at an average speed of 5m/s. How long did he take to complete the race. Working www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  32. Time Now try Lifeskills Ex 5 Ch5 (page 45) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  33. Starter Questions What are the rules for integers ? www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  34. Time Distance Speed Mixed Problems Learning Intention Success Criteria 1. Remember triangle method for distance, speed time problems. • 1. We are revising Basic DST. • Apply triangle method to mixed problems • (Whole Numbers only). www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  35. D=S T Time Distance Speed Mixed Problems D S T www.mathsrevision.com Simple way to remember the 3 formulae ! Created by Mr. Lafferty Maths Dept.

  36. Time Distance Speed Mixed Problems Ex : A bus travels from Glasgow to London a distance of 556.8km. It took 9 hours and 36 minutes. What was the average speed of the bus ? D Working S T www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  37. Time Distance Speed Mixed Problems Example : A train travelled at 70 km/hr for 2hrs 54mins. How far did it travel in this time. D Working S T www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  38. Time Distance Speed Mixed Problems Ex : An aeroplane flies between Glasgow and New York. The distance between the two cities is 3200 miles. The average speed of the plane is 500 mph. How long did the journey take? D Working S T www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  39. Have you updated your Learning Log ? Mixed Questions Now try Lifeskills Ex 6 Ch5 (page 47) www.mathsrevision.com Are you on Target ? I can ? Mind Map Created by Mr. Lafferty Maths Dept.

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