year 8 maths

614
5 √2
6 √7
7 a 24 cm 2 b 48 cm 2
8 63.66%
Multiple-choice questions
1 E 2 B 3 A 4 C 5 B
6 E 7 E 8 B 9 D 10 D
Short-answer questions
1 a 2000 mm b 0.5 km c 300 mm 2 d 0.4 m 2
e 10000 m 2 f 3.5 cm 2 g 0.4 L h 200 L
2 a 13 m b 28 cm c 25.13 m
d 51.42 mm e 48 m f 20 cm
3 a 55 cm 2 b 63 m 2 c 12 cm 2
d 136 km 2 e 64 m 2 f 20 cm 2
g 28.27 cm 2 h 12.57 m 2 i 3.84 cm 2
4 a 70 cm 2 b 50.14 cm 2 c 74 cm 2
5 a 1000 L b 8 L c 0.144 L
6 a 2513.27 m 3 b 3078.76 cm 3 c 212.06 mm 3
7 a i 287°C ii 239°C
b 1 h 39 min 18 s
c 1 h 2 min 4 s
8 a 10 h 17 min
b 9:45 p.m.
c 2331 hours
9 a 6:30 p.m. b 6 p.m. c 8:30 a.m.
d 4:30 p.m. e 10:30 a.m. f 5:30 p.m.
g 8:30 p.m. h 8:30 p.m.
10 a 10
b 25
c 4.24
11 a 15
b 6.24
c 11.36
Extended-response questions
1 a 12.86 cm 2
b 57.72 cm 2
c 57.72 m 2
d 6.28 cm 3
e 25.72 cm 3
f 38 with some remainder
2 a 2.8 m
b 24 m 2
c 23 m
d No, 4000 L short.
Chapter 4
Pre-test
1 a mixed numeral b proper
2 20
c improper
d improper
3 a 100 b 1 c 8 d 4
4 a 1 4
b 3 7
5 a D b C c E
d A
e B
6 a 3 4
b 1 c 1 2 3
d 0.6 e 1.2 f 3
7 a i
1
10
ii 0.1 b i 1 4
ii 0.25
c i
1
2
ii 0.5 d i 3 4
ii 0.75
8 a $5 b $6.60 c 0.8 km d 690 m
9 a 10 b 18 c 90 cents
10
3 1 3 2 99
Fraction
1
4 5 20 5 100
Exercise 4A
1 a 6, 20, 200 b 14, 40, 140
c 1, 6, 42 d 8, 3, 20
2 4 6 , 20
30 , 10
15
3 a false b true c true
d true e true f false
8
4 a
24
e 20
24
6
5 a
30
e 20
30
Decimal 0.75 0.2 0.15 0.4 0.99 1.0 1.6 2.0
Percentage 75% 20% 15% 40% 99% 100% 160% 200%
b
f
6
24
120
24
b 10
30
11
f
30
c 12
24
g 18
24
c 15
30
g 75
30
d 10
24
h 21
24
d 90
30
h 15
30
6 a 6 b 18 c 2 d 7
e 28 f 50 g 15 h 44
7 a 2, 3, 5, 10, 16, 25
b 6, 12, 30, 45, 150, 300
c 4, 6, 8, 14, 20, 30
8 a 6, 12, 24, 30, 75, 300
b 10, 15, 20, 25, 50, 60
c 8, 12, 28, 44, 80, 400
8
5
2
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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