Chapter 7 Decimals Worksheet - New Century Maths Page 34
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38f Linh is an interstate truck driver. Her company gave her a $20 phone card before she
left Melbourne on an interstate trip to Moree in New South Wales. After making
deliveries at each of the towns marked on the strip map below, she telephoned her
truck base in Bendigo. The phone calls were recorded in her log book.
80 km
230 km
230 km
110 km
340 km
Bendigo
Echuca
Narrandera
Parkes
Dubbo
Moree
LOG
Call from
Time
Length of call
Echuca
7:30am
6 min
Narrandera
11:15am
9 min
Parkes
6:50pm
15 min
Dubbo
8:00am
4 min
Moree
4:15pm
22 min
Did Linh’s phone card cover the cost of her phone calls? Explain your answer.
2 FM radio
In the radio and television guide you will find a list of
Frequency
Station
FM stations and their allocated frequencies measured in
(MHz)
megahertz (MHz).
ABC
92.9
a Locate the stations on a number line.
The Edge
96.1
STAR-FM
99.7
90
100
110
WS-FM
101.7
b What is the frequency difference in megahertz
2MBS
102.5
between 2DAY and WS-FM?
c Find the smallest frequency difference between
FM 103
103.2
adjacent stations. (‘Adjacent’ means side-by-side.)
2DAY
104.1
d What is the largest difference in frequency between
MMM
104.9
adjacent stations?
JJJ
105.7
MIX
106.5
2SER
107.3
3 Decimal currency
a Find out about the history of the decimal money system in Australia.
i When was it introduced?
ii What system did it replace?
iii Why was the change made?
iv When were the different coins and notes introduced?
v What changes have occurred since?
b Design a set of notes ($5, $10, $20, $50, $100) that blind and sighted people could
both use.
231
DECIMALS
CHAPTER 7
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