# Time Distance Speed S 3 General www mathsrevision

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Time Distance Speed S 3 General www. mathsrevision. com Revision of Level Time Difference (Counting Calculating Distance Calculating Speed Calculating Time Mixed Problems Time – Distance Graphs 14 -Jun-21 Created by Mr. Lafferty Maths Dept. Method)

Starter Questions www. mathsrevision. com S 3 General 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Revision of Time www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To revise previous Time work. 1. Convert 12 hr to 24 hr clock. 2. Convert 24 hr to 12 hr clock. 3. Count Method to find time intervals. 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Converting Time Revision on Time www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To revise Level D work on converting between 12 and 24 hr clock and vice versa. 14 -Jun-21 1. Change from 12 to 24 hour clock. 2. Change from 24 to 12 hour clock. Created by Mr. Lafferty Maths Dept.

12/24 Hour Clock midnight 1 am 2 am 3 am 4 am 5 am 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 To go from 12 hour clock to 24 hour clock just add 12 to the pm hours: Examples 8 pm becomes 2000 6: 30 pm becomes 4: 20 pm becomes 14 -Jun-21 1830 1620 9 pm becomes 2100 11: 30 pm becomes 2330 3: 10 pm becomes Created by Mr. Lafferty Maths Dept. 1510

12/24 Hour Clock midnight 1 am 2 am 3 am 4 am 5 am 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 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 8 pm 2100 becomes 9 pm 1730 becomes 5: 30 pm 2208 becomes 10: 08 pm 2006 becomes 8: 06 pm 1350 becomes 1: 50 pm 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Converting Time www. mathsrevision. com S 3 General Let’s make up our own questions ! Key Points pm times add on 12 12 hour clock 24 hour clock Analogue clock Digital clock ALWAYS use AM or PM ALWAYS 4 digits Hours 1 - 12 NEVER use AM or PM Hours 0 - 24 greater than 12 subtract 12 14 -Jun-21 Created by Mr. Lafferty Maths Dept

Time Revision of Time www. mathsrevision. com S 3 General Now try Exercise 1 Ch 10 (page 108) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 3 General A T 14 -Jun-21 Created by Mr. Lafferty Maths Dept. W

Counting Method www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To explain the counting method to find the difference between two times. 14 -Jun-21 1. Understand the counting method. 2. Find time differences between two times, showing all working. Created by Mr. Lafferty Maths Dept.

Counting Method www. mathsrevision. com Level D 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 nearest hour 08 40 hours 09 00 20 mins 14 -Jun-21 Hrs What’s left 11 00 2 hrs 11 10 10 mins Created by Mr. Lafferty Maths Dept Mins 20 + 2 10 2 30

But there are 60 minutes = 1 hour Counting Method www. mathsrevision. com Level D 70 mins = 1 hr 10 mins 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 14 40 15 00 20 mins 14 -Jun-21 hours What’s left 18 00 3 hrs Hrs 20 18 50 50 mins 4 hrs 10 mins Created by Mr. Lafferty Maths Dept Mins + 3 50 3 70

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

But there are 60 minutes = 1 hour Counting Method www. mathsrevision. com Level D Let’s make up our own question ! The key steps are left on the slide to help you. nearest hour mins 14 -Jun-21 hours hrs What’s left mins Created by Mr. Lafferty Maths Dept Hrs + Mins

Time Revision of Level D/E www. mathsrevision. com S 3 General Now try Exercise 2 Ch 10 (page 109) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 3 General 4 x 6 x 4 x 120 70 14 -Jun-21 Created by Mr. Lafferty Maths Dept. o o

Distance Working Out Distance www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To explain how to work out simple distance calculations using the distance formula. 14 -Jun-21 1. Know the distance formula. 2. Use the formula to work out simply distance calculations. Created by Mr. Lafferty Maths Dept.

Distance Working out Distances www. mathsrevision. com S 3 General Imagine you were travelling in a train at a steady speed of 80 km/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 Can you guess what the formula is : in symbols 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Distance Working Out Distance www. mathsrevision. com S 3 General Now try Exercise 3 Ch 10 (page 110) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 3 General 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Speed Working Out Speed www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To explain how to work out simple speed calculations using the speed formula. 14 -Jun-21 1. Know the speed formula. 2. Use the formula to work out simple speed calculations. Created by Mr. Lafferty Maths Dept.

Speed Working Out Speed www. mathsrevision. com S 3 General 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 : 15 km/hr Can you guess what the formula is : in symbols 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Speed Working Out Speed www. mathsrevision. com S 3 General Now try Exercise 4 Ch 10 (page 112) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 3 General 4 cm 14 -Jun-21 Created by Mr. Lafferty Maths Dept. x cm

Time Working Out Time www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To explain how to work out simple time calculations using the time formula. 14 -Jun-21 1. Know the time formula. 2. Use the formula to work out simple time calculations. Created by Mr. Lafferty Maths Dept.

Time Working Out Time www. mathsrevision. com S 3 General 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 Can you guess what the formula is : in symbols 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Working Out Time www. mathsrevision. com S 3 General Now try Exercise 5 Ch 10 (page 113) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 3 General 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Distance Speed Mixed Problems www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To show the traingle method of remembering the distance, speed and time formulae. 14 -Jun-21 1. Know and remember triangle method for distance, speed time problems. 2. Apply triangle method to mixed problems. Created by Mr. Lafferty Maths Dept.

Time Distance Speed Mixed Problems www. mathsrevision. com S 3 General D=S x T D S T Simple way to remember the 3 formulae ! 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Distance Speed Mixed Problems S 3 General www. mathsrevision. com Example 1 : Daniel drove from his house to the Blackpool, a distance of 135 miles. It took him 2 hrs 15 mins. What was his average speed? Working 14 -Jun-21 Time MUST be in decimal form Created by Mr. Lafferty Maths Dept. D S T

Time Distance Speed Mixed Problems S 3 General www. mathsrevision. com Example 2 : A racing car travelled at 50 km/hr. What is the distance covered in 6 hours ? Working D S T 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Distance Speed Mixed Problems S 3 General www. mathsrevision. com Example 1 : How long did the bus journey take if it travelled a total distance of 60 km at and an average speed of 40 km/hr. Working D S T 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Distance Speed Mixed Problems www. mathsrevision. com S 3 General Now try Exercise 6 Ch 10 (page 114) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 3 General 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Distance Graph Interpreting Time – Distance Graphs www. mathsrevision. com S 3 General Learning Intention Success Criteria 1. To interpret Time – Distance Graphs. 14 -Jun-21 1. Understand the term interpret. 2. Understand that the speed can be calculated from the Time - Distance Graph. Created by Mr. Lafferty Maths Dept.

Time Distance Graph Interpreting Time – Distance Graphs www. mathsrevision. com S 3 General 14 -Jun-21 Created by Mr. Lafferty Maths Dept.

Time Distance Speed www. mathsrevision. com S 3 General Now try Exercise 7 Ch 10 (page 115) 14 -Jun-21 Created by Mr. Lafferty Maths Dept.