year 8 maths

226 Chapter 4 Fractions, decimals, percentages and financial mathematics
Example 14
3 Convert the following fractions to decimals.
3
3
a
b
5
4
c
1
8
d
11
20
Example 15
4 Express the following fractions as recurring decimals.
1
5
a
b
c
3
9
5
6
d
8
11
e
3
7
f
5
13
2
g 3
15
6
h 4
7
5 Write down the ‘critical’ digit (i.e. the digit immediately after the rounding digit) for each of the
following.
a 3.5724 (rounding to three decimal places)
b 15.89154 (rounding to one decimal place)
c 0.004571 (rounding to four decimal places)
d 5432.726 (rounding to two decimal places)
6 State how you round decimal numbers on your calculator.
Example 16
7 Round each of the following to the specified number of decimal places, which is the number in the
bracket.
a 0.76581 (3)
b 9.4582 (1)
c 6.9701 (1)
d 21.513426 (4)
e 0.9457 (2)
f 17.26 (0)
g 8.5974 (2)
h 8.10552 (3)
Example 17
8 Write each of the following decimals, correct to two decimal places.
a 17.0071
b 0.9192
c 4.4444
d 14.5172
e 5.1952
f 78.9963
g 0.0015
h 2.6808
9 Round each of the following to the nearest whole number.
a 65.3197
b 8.581
c 29.631
d 4563.18
10 Write each of the following fractions as decimals, correct to two decimal places.
6
2
4
a
b
c
d
7
9
11
5
12
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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