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MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Time Revision MNU 1-10a Counting Method www.mathsrevision.com Stopwatch Time.

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Presentation on theme: "MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Time Revision MNU 1-10a Counting Method www.mathsrevision.com Stopwatch Time."— Presentation transcript:

1 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Time Revision MNU 1-10a Counting Method Stopwatch Time

2 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Starter Questions Q1.Calculate Q2.Round to 1 decimal place Q3. How many minutes in 3hours Q4.The answer to the question is 180. What is the question.

3 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Learning Intention Success Criteria 2.Change from 24 to 12 hour clock. 1.To revise previous work on converting between 12 and 24 hr clock and vice versa. Revision 1.Change from 12 to 24 hour clock. Converting Time

4 2-Jun-14Created by Mr.Lafferty Maths Dept pm10 pm9 pm8 pm7 pm6 pm5 pm4 pm3 pm2 pm1 pmmidday am10 am9 am8 am7 am6 am5am4 am3 am2 am1 am midnight 12/24 Hour Clock To go from 12 hour clock to 24 hour clock just add 12 to the pm hours: Examples 8 pm becomes 9 pm becomes 6:30 pm becomes 11:30 pm becomes 4:20 pm becomes 3:10 pm becomes 1510

5 2-Jun-14Created by Mr.Lafferty Maths Dept pm10 pm9 pm8 pm7 pm6 pm5 pm4 pm3 pm2 pm1 pmmidday am10 am9 am8 am7 am6 am5am4 am3 am2 am1 am midnight 12/24 Hour Clock To go from 24 hour clock to 12 hour clock just subtract 12 from the hours if it is greater than 12: 8 pm 9 pm 5:30 pm 10:08 pm 8:06 pm Examples 2000 becomes 2100 becomes 1730 becomes 2208 becomes 2006 becomes 1350 becomes 1:50 pm

6 MNU 2-10a MNU 2-10b greater than 12 subtract 12 Lets make up our own questions ! 2-Jun-14Created by Mr.Lafferty Maths Dept Converting Time Key Points 12 hour clock Analogue clock ALWAYS use AM or PM 24 hour clock Digital clock NEVER use AM or PM pm times add on 12 ALWAYS 4 digits Hours Hours

7 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Now try Exercise 1 Ch3 (page 43) Time Revision

8 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Starter Questions Starter Questions

9 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Learning Intention Success Criteria 2.Find time differences between two times, showing all working. 1.We are learning the counting method to find the difference between two times. 1.Understand the counting method.. Counting Method

10 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Counting Method When working out time difference we will use the Counting Method. This method will always work. Example : Find the time difference between hrs and hrs HrsMins nearest hour Whats left hours 20 mins2 hrs10 mins

11 MNU 2-10a MNU 2-10b A bus leaves Kirkintilloch Main Street at hrs and arrives in Aberdeen at hrs. How long was the journey. 2-Jun-14Created by Mr.Lafferty Maths Dept Counting Method HrsMins nearest hour Whats left hours 20 mins3 hrs50 mins But there are 60 minutes = 1hour 70 mins = 1hr 10mins 4hrs 10 mins

12 Using Timetables Until Hour Every And Glasgow Bus Station George Square Port Dundas Springburn Milton Bishopbriggs Kirkie Bus Station * * * How long does the first bus take from Kirkie to Glasgow HrsMins nearest hour Whats left hours 35 mins0 hrs14 mins

13 MNU 2-10a MNU 2-10b Lets make up our own question ! The key steps are left on the slide to help you. 2-Jun-14Created by Mr.Lafferty Maths Dept Counting Method HrsMins nearest hour Whats left + hours mins hrs mins But there are 60 minutes = 1hour

14 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Now try Exercise 2 Ch3 (page 44) Counting Method

15 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Starter Questions Starter Questions

16 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Learning Intention Success Criteria 1.We are learning to work out accuracy to 1 and 2 decimal places. 1.Round to 1 and 2 decimal places. Time Minutes and Secs

17 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Time Minute & Seconds Rounding time to 1 or 2 decimal places is just the same as rounding any number. Example : Round the times to 1 and 2 decimals places (a)4.573 secs 4.6 secs to 1 decimal place 4.57 secs to 2 decimal place (b) secs 52.5 secs to 1 decimal place secs to 2 decimal place

18 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Time Minute & Seconds Note : In athletics the winner of a race corresponds to the smallest time. Example : In a race the times are as follows Mark sec, Caitlin 10.05sec, Owen sec, Amy sec and Euan sec. Work out who won the race and the order they came in. 1 st Owen sec 2 nd Caitlin 10.05sec 3 rd Euan sec 4 th Amy sec 5 th Mark sec

19 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Time Minute & Seconds Example : In a race Katrina beat Daniel by 0.53 sec. Daniels time was secs. What was Katrinas time ? Katrina won therefore her time will be 0.53 less.

20 MNU 2-10a MNU 2-10b 2-Jun-14Created by Mr.Lafferty Maths Dept Now try Exercise 3 Ch3 (page 46) Time Minute & Seconds


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