Download GCSE Maths

HIGHER UNIT 1 – NUMBER
ISTUDY – DEVELOPING SKILLS
1
7.13 × 6.2 = 44.206
a Write down two more multiplications with an answer of 44.206
b Write down a division with an answer of 0.713
(3 marks)
2
List these numbers in order, starting with the smallest.
Show your working.
4.72 52 9.4 3 125
(3 marks)
3


a Estimate 23.7 – 64.25  4.76
b Use a calculator to work out the answer. Give your answer correct to 1 decimal place.
(2 marks)
4
a Write 24 as a product of its prime factors in index form.
b Use your answer to write 483 as a product of its prime factors in index form.
(4 marks)
5
Work out the HCF and LCM of 48 and 72.
(3 marks)
6
Find the value of x.
a 32 × 3x = 36
b 7x ÷ 7–4 = 79
c 5x × 5 x = 5 8
(3 marks)
7
Write (83)6 as a single power.
(1 mark)
8
Use prime factors to determine whether 2080 is divisible by 16.
(2 marks)
9
Write each number in standard form.
a 0.000 000 047
b 0.6 million
c 510 × 108
(3 marks)
HIGHER UNIT 1 – NUMBER
ISTUDY – DEVELOPING SKILLS
5
–2
10 Write 7 as a fraction in its simplest form.
(2 marks)
11 Work out the area of this shape.
Write your answer as a surd in its simplest form.
(3 marks)
12 Rationalise the denominator 12
10
(2 marks)
Overall mark
/31