Page 11 - ACE YR IGCSE A TOP APPR' TO MATHS

(b) AC – B

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(c) A – BC
2

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(d) (ABC) 2

[2]
(e) A
BC

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A
(f)
(B – C) 2

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2 The world population was 6.2 × 10 in 2015. It is predicted that in 2030, the world population will
10
increase to 8.97 × 10 . Find the predicted number of increase in the population, write your answer in
12
standard form.

[2]

3 Work out, give your answer in standard form.

4.05 × 10 + 4.05 × 10 40
38

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4 Calculate 1.3 × 10 ÷ (2 ÷ 10 ). Give your answer in standard form.
5
–2

[2]

Cambridge IGCSE
TM
6 Ace Your Mathematics

Chapter 1A.indd 6 15/03/2022 10:26 AM