Num 12 Jun 2022 12 Jun 2022 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. Time Distance Speed Time Distance Speed Revision of Level 2 Time Calculating Distance www.mathsrevision.com Calculating Speed Calculating Time Mixed Problems
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Num 8-Jan-16Created by Mr. Lafferty Maths Dept. Time Distance Speed Revision of Level 2 Time Calculating Distance Calculating Speed.
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21 Apr 202321 Apr 2023 Created by Mr. Lafferty Maths Dept.Created by Mr. Lafferty Maths Dept.
Time Distance Time Distance SpeedSpeed
Revision of Level 2 Time
Calculating Distance
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Calculating Speed
Calculating Time
Mixed Problems
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21 Apr 202321 Apr 2023 Created by Mr. Lafferty Maths Dept.Created by Mr. Lafferty Maths Dept.
Starter QuestionsStarter Questionsw
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5 (5 2 )
(-2 ) (6 ) 10
2. I want to split 39 pence between Daniel and Amy
in the ratio 6:7. How much will each get.
x
g g
a a a
1. Solve
3. Expand
4. Simplify
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1.1. Remember the time Remember the time formula. formula.
2.2. Apply the formula to Apply the formula to calculate simple time.calculate simple time.
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Basic Fractional Basic Fractional HoursHours
You should already know :
130mins = hour =0.5 hour
2
115mins = hour =0.25 hour
4
345mins = hour =0.75 hour
4
120mins = hour =0.33.. hour
3
240mins = hour =0.66.. hour
3
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
Converting Hrs Mins to Decimal Time
To convert minutes to decimal hourswe simply divide minutes by 60.
Example : 48 minutes to decimal is48
60= 0.8 hr
Example :2hr 15 minutes to decimal is15
260
= 2.25 hr
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
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
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
Converting Hrs Mins to Decimal Time
Try and remember the more common decimal hours
6 mins → 0.1 hrs12 mins → 0.2 hrs18 mins → 0.3 hrs24 mins → 0.4 hrs30 mins → 0.5 hrs36 mins → 0.6 hrs42 mins → 0.7 hrs48 mins → 0.8 hrs54 mins → 0.9 hrs
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
Converting Hrs Mins to Decimal Time
Calculate the decimal hour value for minutes below.
0.7hrs
0.6hrs
0.2hrs
0.4hrs
0.3hrs0.5hrs0.1hrs0.9hrs
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
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
MNU 4-10b
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
Example : 0.7 hrs to minutes is 0.7 ×60 = 42 mins
Example : 3.4 hrs to hours and minutes is
3+0.4 ×60= 3 hrs 24 mins
Converting Decimal Time to Hrs Mins
To change decimal time to minutes ‘multiply by 60’
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Decimal Time to Hrs Decimal Time to Hrs Mins Mins
Calculate the hours and minutes for theses decimal hours
3hrs 30mins
4hr 15mins
6hrs 45mins
MNU 4-10b
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Hrs Mins to Decimal Hrs Mins to Decimal TimeTime
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
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TimeTimeWorking 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
Can you guess what the formula is :
DistanceTime =
Speedin symbols
DT =
S
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TimeTime
Ex : Tony ran 400 metres at an average speed of 5m/s.How long did he take to complete the race.
Working
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21 Apr 202321 Apr 2023 Created by Mr. Lafferty Maths Dept.Created by Mr. Lafferty Maths Dept.
Now try LifeskillsEx 5
Ch5 (page 45)
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TimeTime
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21 Apr 202321 Apr 2023 Created by Mr. Lafferty Maths Dept.Created by Mr. Lafferty Maths Dept.
Starter Starter QuestionsQuestions
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What are the rules for integers ?
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