Page 15 - ACE YR IGCSE A TOP APPR' TO MATHS

8 If 10 workers can build 8 houses in 5 months. How long would it take for 20 workers to build the same
number of houses?

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9 Sean takes 150 days to reduce 12 kilograms of his weight by doing 30 minutes exercise every day. If he
does exercise 1 hour 15 minutes every day, how many days would he take to reduce the same weight?

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Fractions

1 Without using a calculator, show that

(a) 3 2 + 1 1 = 4 13
7 3 21

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(b) 8 3 – 6 2 = 1 19
10 3 30

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2 Without using a calculator, work out 2 3 – 1 ÷ 2.
4 6
Write down all the steps of your working and give your answer as a fraction in its simplest form.

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Cambridge IGCSE
TM
10 Ace Your Mathematics

Chapter 1A.indd 10 15/03/2022 10:27 AM