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MATHEMATICS Recognising & Writing Fractions

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Lesson Objectives The aim of this powerpoint is to help you… to recognise fractions – proper, improper and mixed numbers to write fractions correctly to express what fraction of a shape is shaded or unshaded

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What is a Fraction? A fraction is a value that is worth part of a whole number. The top of a fraction is called the NUMERATOR. It tells you how many of the fraction you have. The bottom of a fraction is called the DENOMINATOR. It tells you the type of fraction you have.

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What fraction is shaded? To write what fraction of a shape is shaded… …Top of fraction = number of shaded parts …Bottom of fraction = total number of equal-sized parts However, please REMEMBER that you cannot have a decimal or a fraction within a fraction so… This is not a valid fraction – you can’t have a fraction within a fraction! This is not a valid fraction – you can’t have a decimal within a fraction! This is a valid fraction!

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Example 1

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Example 1 (continued)

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Example 2

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Quick Practice What fraction of each of the following shapes is shaded? Work out your answers BEFORE you go on to the next slide to check!

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Answers 1 of the 4 parts is shaded so fraction shaded = ¼ 3 of the 8 parts are shaded so fraction shaded = 3 / 8 Before we can work out what fraction has been shaded we need to make sure that all the parts are of equal size! Now we can see that… 2 of the 7 parts are shaded so fraction shaded = 2 / 7

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Types of Fractions…

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Quick Check What type of fraction are each of the following? Are they proper, improper or mixed numbers? Work out your answers BEFORE moving on to the next slide. Can you also think of two more of your own examples for each type of fraction?

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Answers This is an IMPROPER fraction – top is bigger than bottom! This is a PROPER fraction – top is smaller than bottom! This is a MIXED NUMBER.

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What next? Print out the notes called Frac1a and Frac1b. Read through them and make sure you answer any questions. Work through pages 1 to 6 of the MyMaths lesson called Simple Fractions found at: http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=fractions/simpleFractions&taskID=1220 http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=fractions/simpleFractions&taskID=1220 Now work through pages 1 to 6 of the MyMaths lesson called Fractions of Amounts found at: http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=fractions/fractions1&taskID=1018 Now work through pages 4 to 7 of the MyMaths lesson called More Fractions found at: http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=fractions/fractionsGold&taskID=1370 If you need more practice try the worksheet called Fractions-S1.xlsx Now move on to the Frac-2 powerpoint

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