New PDF release: 2tier-foundation for Edexcel A

By Brian Speed, Keith Gordon, Kevin Evans

ISBN-10: 0007215622

ISBN-13: 9780007215621

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In a packet of biscuits, –61 are digestives, –32 are bourbons and the rest are jammy dodgers. What fraction are jammy dodgers? Jide pays –41 of his wages in tax and –81 of his wages in National Insurance. What fraction of his wages does he take home? 8 Finding a fraction of a quantity In this section you will learn how to: ● find a fraction of a given quantity To do this, you simply multiply the quantity by the fraction. qxd 15/03/06 17:32 Page 39 CHAPTER 2: FRACTIONS EXAMPLE 5 Find –34 of £196.

For example, –2 + 6 = 4 +6 –2 –10 • –5 4 5 0 Subtracting a positive number moves the marker down the thermometer scale. For example, 3 – 5 = –2 –5 3 –2 –10 –5 5 0 EXAMPLE 1 The temperature at midnight was 2 °C but then it fell by 5 degrees. What was the new temperature? To put it simply, the problem is 2 – 5, which is equal to –3. So, the new temperature is –3°C. qxd 14/03/06 14:30 Page 57 CHAPTER 3: NEGATIVE NUMBERS EXAMPLE 2 The temperature drops five degrees from –4 °C. What does it drop to?

What fraction of her winnings does she keep to spend? 11 Reciprocals and rational numbers In this section you will learn how to: ● recognise rational numbers, reciprocals, terminating decimals and recurring decimals ● convert terminal decimals to fractions ● convert fractions to recurring decimals ● find reciprocals of numbers or fractions Key words rational number reciprocal recurring decimal terminating decimal Rational decimal numbers A fraction, also known as a rational number, can be expressed as a decimal that is either a terminating decimal or a recurring decimal.

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2tier-foundation for Edexcel A by Brian Speed, Keith Gordon, Kevin Evans

by Charles

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