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

By Brian Speed, Keith Gordon, Kevin Evans

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A 2 °C – 4 °C = b 4 °C – 7 °C = c 3 °C – 5 °C = d 1 °C – 4 °C = e 6 °C – 8 °C = f 5 °C – 8 °C = g –2 + 5 = h –1 + 4 = i –4 + 3 = j –6 + 5 = k –3 + 5 = l –5 + 2 = m –1 – 3 = n –2 – 4 = o –5 – 1 = p 3–4= q 2–7= r 1–5= s –3 + 7 = t 5–6= u –2 – 3 = v 2–6= w –8 + 3 = x 4–9= Answer each of the following without the help of a thermometer scale. a 5–9= b 3–7= c –2 – 8 = d –5 + 7 = e –1 + 9 = f 4–9= g –10 + 12 = h –15 + 20 = i 23 – 30 = j 30 – 42 = k –12 + 25 = l –30 + 55 = m –10 – 22 = n –13 – 17 = o 45 – 50 = p 17 – 25 = q 18 – 30 = r –25 + 35 = s –23 – 13 = t 31 – 45 = u –24 + 65 = v –19 + 31 = w 25 – 65 = x 199 – 300 = Work out each of the following.

2 3 or ƒ 2 3 This means –23 or two-thirds. Key the top-heavy fraction –95 into your calculator. The display will look like this. Now press the equals key 9ƒ5 9 5 =. The display will change to: 1 4 5 This is the mixed number 1–45 . ) Write down the result: 4 9 =1 5 5 Key the top-heavy fraction –84 into your calculator. The display will look like this. Now press the equals key 8ƒ4 8 4 =. The display will change to: 2 This represents the whole number 2. Whole numbers are special fractions with a denominator of 1.

Cut one into quarters, another into fifths and the last into tenths. 1 4 1 4 1 5 1 4 1 5 1 5 1 5 1 10 1 10 1 10 1 10 1 10 1 10 1 10 1 10 1 10 1 10 1 5 1 4 Use the strips to find the equivalent fraction in twentieths to each of the following. a 1 4 b 1 5 c 3 4 d 4 5 e 1 10 f 1 2 g 3 5 h 2 5 i 7 10 j 3 10 e 1 7 + 10 4 Use the strips to write down the answer to each of the following. 4 13/03/06 14:17 Page 31 Equivalent fractions and cancelling In this section you will learn how to: ● create equivalent fractions ● cancel fractions, where possible Key words denominator lowest terms numerator Equivalent fractions are two or more fractions that represent the same part of a whole.

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