Units Of Measurement And Applications Worksheet Page 11
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44WORKED EXAMPLE 2
Convert 384 min to:
a
b
hours
hours and minutes.
Solve
Think
Apply
384 min = 384 ÷ 60 h
a
6.4 h
Divide the number of minutes
= 6.4 h
by 60.
0.4 h = 0.4 × 60 min
b
6 h 24 min
If the answer contains a
= 24 min
decimal, either use the degrees/
Hence, 6.4 h = 6 h and 24 min.
minutes/seconds key or multiply
the decimal part by 60 to
Calculator method
convert the answer to hours and
Find the degrees/minutes/seconds key.
minutes.
Press 6.4
°
' ''
SHIFT
The calculator displays
6°24°0°
which may be read as 6 h and 24 min.
26
Complete the following conversions.
114 h = 114 ÷ ____ d
456 min = 456 ÷ ____ h
291 s = 291 ÷ ____ min
a
b
c
= ____ d
= ____ h
= ____ min
= 5.7 h
342 min = 342 ÷ ____ h
438 s = 438 ÷ ____ min
d
e
N ow 0.7 h = 0.7 × ____ min
= 7.3 min
= ____ min
N ow 0.3 min = 0.3 × ____ s
∴ 342 min = 5 h and ____ min
= ____ s
∴ 438 s = 7 min and ____ s
27
Convert the following to:
i
ii
hours
hours and minutes.
a
b
c
d
e
168 min
192 min
261 min
339 min
267 min
28
Convert the following to:
i
ii
minutes
minutes and seconds.
a
b
c
d
e
114 s
216 s
153 s
411 s
243 s
INVESTIGATION 2.1
2D
Prefixes for units of measurement
Prefixes for units of measurement
Prefi xes indicate the factor of 10 by which the base metric unit is multiplied. For example, the unit kilogram uses
the base unit for mass, the gram, with the prefi x kilo, which indicates a multiplying factor of 1000: 1 kg = 1000 g.
The table at the top of the next page summarises the most common prefi xes used for very large and very small
measurements.
Chapter 2
Units of measurement and applications
45
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