Numeracy Worksheet - Castlebrae Community High School - 2012 Page 24
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47FHS Numeracy
contents page
Time
It is important to be able to change between units of time.
Hours to minutes and minutes to hours.
Students should recognise everyday equivalences.
MINUTES
HOURS
Level 3
15
1
15 mins
hr
hr
0.25 hr
60
4
30
1
30 mins
hr
hr
0.5 hr
60
2
45
3
45 mins
hr
hr
0.75 hr
60
4
Example 1
Change minutes into hours
Divide by 60
Level 4
20
20 mins =
= 0.333333. . . hrs = 0.33 hrs (2.d.p.)
60
12
12 mins =
= 0.2 hrs
60
55
55 mins =
= 0.916666 . . . hrs = 0.92 hrs (2.d.p)
60
2hrs 18 mins = 2.3hrs
18 mins = 18 = 0.3 hrs
60
Example 2
Change hours into minutes
Multiply by 60
Level 4
0.6 hrs = 0.6 x 60 = 36 mins
0.35 hrs = 0.35 x 60 = 21 mins
2.8 hrs = 2hrs 48 mins
0.8 hrs = 0.8 x 60 = 48 mins
= 168 mins
2 hrs
= 2 x 60
= 120 mins
0.8 hrs = 0.8 x 60 = 48 mins
168 mins
or
2.8 hrs = 2.8 x 60 = 168 mins
24
L Watson 2012
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