Created by Mr.Lafferty Maths Dept Time Converting 12hour to 24 hour clock Counting Method www.mathsrevision.com Days Months and Years Adding / Subtracting Time 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Starter Questions Q1. Calculate Q2. Round to 1 decimal place 2.354 Q3. How many minutes in 1 hour www.mathsrevision.com Q4. The answer to the question is 10. What is the question. 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Converting Time Learning Intention Success Criteria To explain how to convert between 12 and 24 hour clock and vice versa. Change from 12 to 24 hour clock. 2. Change from 24 to 12 hour clock. www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 11 pm 10 pm 9 pm 8 pm 7 pm 6 pm 5 pm 4 pm 3 pm 2 pm 1 pm midday 1100 1000 0900 0800 0700 0600 0500 0400 0300 0200 0100 0000 11 am 10 am 9 am 8 am 7 am 6 am 5am 4 am 3 am 2 am 1 am midnight 12Hour to 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 2000 2100 1830 2330 1620 1510 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 11 pm 10 pm 9 pm 8 pm 7 pm 6 pm 5 pm 4 pm 3 pm 2 pm 1 pm midday 1100 1000 0900 0800 0700 0600 0500 0400 0300 0200 0100 0000 11 am 10 am 9 am 8 am 7 am 6 am 5am 4 am 3 am 2 am 1 am midnight 24 Hour to 12 Hour Clock To go from 24 hour clock to 12 hour clock just subtract 12 from the hours if it is greater than 12: Examples 2000 becomes 2100 becomes 1730 becomes 2208 becomes 2006 becomes 1350 becomes 8 pm 9 pm 5:30 pm 10:08 pm 8:06 pm 1:50 pm 16-Jun-18 Created by Mr.Lafferty Maths Dept

Converting Time Key Points Let’s make up our own questions ! pm times add on 12 12 hour clock 24 hour clock www.mathsrevision.com Analogue clock Digital clock ALWAYS use AM or PM ALWAYS 4 digits Hours 1 - 12 NEVER use AM or PM greater than 12 subtract 12 Hours 0 - 24 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Time Now try TJ2a Ex 2 Ch4 (page 29) www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Starter Questions P Q R www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Counting Method Learning Intention Success Criteria To explain the counting method to find the difference between two times. 1. Understand the counting method. 2. Find time differences between two times, showing all working. www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created 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 08 40 hrs and 11 10 hrs Hrs Mins nearest hour www.mathsrevision.com hours What’s left 20 2 08 40 09 00 11 00 11 10 + 10 20 mins 2 hrs 10 mins 2 30 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept But there are 60 minutes = 1hour 70 mins = 1hr 10mins Counting Method A bus leaves Kirkintilloch Main Street at 14 40 hrs and arrives in Aberdeen at 18 50 hrs. How long was the journey. nearest hour hours What’s left Hrs Mins www.mathsrevision.com 20 14 40 15 00 18 00 18 50 3 20 mins 3 hrs 50 mins + 50 3 70 4hrs 10 mins 16-Jun-18 Created by Mr.Lafferty Maths Dept

Using Timetables 2314 2302 2254 2248 2243 2237 2225 2214 2202 2154 2148 2143 2137 2125 2114 2102 2054 2048 2043 2037 2025 Until Hour Every And 1114 1102 1054 1048 1043 1037 1025 1014 1002 0954 0948 0943 0937 0925 0914 0902 0854 0848 0843 0837 0825 Glasgow Bus Station George Square Port Dundas Springburn Milton Bishopbriggs Kirkie Bus Station * * How long does the first bus take from Kirkie to Glasgow. nearest hour Hrs Mins hours What’s left 35 35 08 25 09 00 09 00 09 14 35 mins 0 hrs 14 mins + 14 14 49

Counting Method + Let’s make up our own question ! But there are 60 minutes = 1hour Counting Method Let’s make up our own question ! The key steps are left on the slide to help you. nearest hour hours What’s left Hrs Mins www.mathsrevision.com mins hrs mins + 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Counting Method Now try TJ2a Ex 3 & 4 Ch4 (page 31) www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Starter Questions 34 x 10 Name the angle. What type of angle is it. 5600 ÷ 100 P R Q www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Days, Months and Years Learning Intention Success Criteria We are learning connections between Days ,Months and Years. 1. Understand connects between Days Months and Years. www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept 366 days in a leap year. (Every 4 years) Counting Method You need to learn if you do not already know that there are 365 days in a year 12 months in a year www.mathsrevision.com 52 weeks in a year 7 days in a year 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Counting Method Rhyme to remember how many days in a month. 30 days has September, April, June and November. All the rest have 31, except February which has 28 days clear and 29 in each leap year. www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Days, Months and Years Now try TJ2a Ex 5 Ch4 (page 34) www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Starter Questions www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Time Learning Intention Success Criteria 1. Be able to add and subtract minutes and seconds. We are learning to add and subtract minutes and seconds. www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept

Adding & Subtracting Time 60 secs = 1min To add and subtract time we must remember (a) Add 4 mins 30secs to 2 mins 25 mins Always layout in columns Mins Secs www.mathsrevision.com 4 30 + 2 25 6 55 16-Jun-18 Created by Mr.Lafferty Maths Dept

Adding & Subtracting Time 60 secs = 1min 80 secs =1min 20 secs To add and subtract time we must remember (a) Add 3 mins 35 secs to 9 mins 45 mins Always layout in columns Mins Secs www.mathsrevision.com 3 35 + 9 45 =13min 20 secs 12 80 16-Jun-18 Created by Mr.Lafferty Maths Dept

Adding & Subtracting Time 60 secs = 1min To add and subtract time we must remember (a) Subtract 2 mins 35secs from 5 mins 40 mins Always layout in columns Mins Secs www.mathsrevision.com 3 1 5 40 - 2 35 3 05 16-Jun-18 Created by Mr.Lafferty Maths Dept

Adding & Subtracting Time 60 secs = 1min To add and subtract time we must remember (a) Subtract 3 mins 30secs from 7 mins 20 mins Always layout in columns Mins Secs www.mathsrevision.com 60 6 7 20 - 3 30 3 50 16-Jun-18 Created by Mr.Lafferty Maths Dept

Created by Mr.Lafferty Maths Dept Time Minute & Seconds Now try TJ2a Ex 6 Ch4 (page 35) www.mathsrevision.com 16-Jun-18 Created by Mr.Lafferty Maths Dept