1. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Time Distance Speed Mixed Basic DST Converting Hrs Mins to Decimal Time www.mathsrevision.com Converting Hrs Mins to Decimal Time

2. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com 4x 6x 120 o 70 o 4x

3. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1.Understand the DST formulae. 1.We are reviewing basic DST. Mixed DST 2.Apply the correct formula to calculate DST.

4. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Time Distance Speed Mixed Problems D ST Simple way to remember the 3 formulae ! D=S T

5. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Basic Fractional Hours You should already know :

6. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Distance Example : A racing car travelled at 50 km/hr. What is the distance covered in 6 hours ? Working

7. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 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

8. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Time Ex : Tony ran 400 metres at an average speed of 5m/s. How long did he take to complete the race. Working

9. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Now try N5 Lifeskills Ex 1 Ch5 (page 46) www.mathsrevision.com Mixed DST

10. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com What are the rules for addition and subtraction of integers ?

11. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1.Understand the rule for changing hours and minutes to decimal time. 1.We are learning the rule for changing hours and minutes to decimal time. Mixed DST 2.Be able calcultae DST using decimal time.

12. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 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 Example :2hr 15 minutes to decimal is = 2.25 hr

13. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Hrs Mins to Decimal Time Calculate the decimal hour value for minutes below. 9.75 hrs 7.25 hrs 6.5 hrs Convert 9 hrs 45 mins into hours Convert 7 hrs 15 mins into hours Convert 6 hrs 30 mins into hours

14. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 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 36 mins → 0.6 hrs 42 mins → 0.7 hrs 48 mins → 0.8 hrs 54 mins → 0.9 hrs

15. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Hrs Mins to Decimal Time Converting Hrs Mins to Decimal Time Calculate the decimal hour value for minutes below. 0.7hrs 0.6hrs 0.2hrs 0.4hrs 0.3hrs 0.5hrs 0.1hrs 0.9hrs

16. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 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 ? Working D ST

17. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Time Distance Speed Mixed Problems Example : A train travelled at 70 km/hr for 2hrs 54mins. How far did it travel in this time. Working D ST

18. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Now try N5 Lifeskills Ex 2 Ch5 (page 48) www.mathsrevision.com Time

19. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com Make up your own question on ratio.

20. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1.Understand the rule for changing decimal time to hours and minutes. 1.We are learning the rule for changing decimal time to hours and minutes. Mixed DST

21. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Hrs Mins to Decimal Time You should already know : To change minutes to a decimal time ‘divide by 60’ To convert back to and minutes we do the opposite : To change decimal time to minutes ‘multiply by 60’ Converting Decimal Time to Hrs Mins

22. MNU 4-10b 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Hrs Mins to Decimal Time Example : 0.7 hrs to minutes is = 42 mins Example : 3.4 hrs to hours and minutes is = 3 hrs 24 mins Converting Decimal Time to Hrs Mins To change decimal time to minutes ‘multiply by 60’

23. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Decimal Time to Hrs Mins Calculate the hours and minutes for theses decimal hours 3hrs 30mins 4hr 15mins 6hrs 45mins

24. MNU 4-10b 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 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 1hr 24mins 3hrs 18mins

25. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 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 ? Working D ST

26. N5 Num 16-Mar-16Created by Mr. Lafferty Maths Dept. Now try N5 Lifeskills Ex 3 Ch5 (page 50) www.mathsrevision.com Mixed Questions Have you updated your Learning Log ? Are you on Target ? I can ? Mind Map