Revision Worksheet Level 8 1.1 Directed numbers
Transcript of Revision Worksheet Level 8 1.1 Directed numbers
1.1 Directed numbers
© 2020 Cambridge University Press Unit 1 Integers, powers and roots1/2
SOLUTIONS
TASK 1
a)
–5.5 + 6.2
= 0.7
b)
–2.8 –
(–4.6)
= 1.8
c)
1.9 –
7.3
= –5.4
d)
–7.6 –
(–5.2)
= –2.4
e)
–8.6 –
(–5.8) + (–1.7)
= –4.5
2
i)
–4.8 + [ 2.3 ] = –2.5
ii)
–6.2 –
[ –1.5 ] = –4.7
iii)
5.6 + [ –9.5
] = –3.9
3
a)
(–0.5) × 8
= –4
b)
(–2.4) × (–0.2)
= 0.48
c)
9.6 ÷ (–6)
= –1.6
d)
25.5 ÷ (–0.5)
= –51
e)
(–0.9) × (–0.03)
= 0.027
f)
(–0.3)2
= 0.09
g)
(–0.5)3
= –
0.125
h)
(–2.5) × 6 ÷ (–0.5)
= 30
1
3.2–= 24)–0.2) × (–(j)
= 4.80.6)–0.4) × (–÷ (3.2i)
Revision Worksheet Level 8
1.4 Working with indices
© 2020 Cambridge University Press Unit 1 Integers, powers and roots
SOLUTIONS
TASK 2
1
a
1
4
b
1
16
c
1
64
2
a
36
b
1
36
c
1
6
d
1
e
216
3
a
1
3
b
1
81
c
1
125
d
1
11
e
1
196
4
a
14
9
b
211
4
c
5
6
7
13TASK TASK 3
8<3
500√<7ℎ5<3 100√<4𝑔4<3 60√<3𝑓3<3
25√<2𝑒
21<512√<11𝑑10<97√<9𝑐6<35√<5𝑏3<7√<2𝑎
2 Find the value of n in each of the following
1 Simplify each of the following
4TASK TASK 4
1=0𝑓𝑐2𝑏𝑏84𝑎
6𝑐16𝑏6−𝑎
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