1mpes2 reduce fractions multiply and divide on ecole supérieure de commerce de neuchâtel pierre...
DESCRIPTION
Reduce Fractions To reduce fractions we common divide out factorsTRANSCRIPT
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1MPES2Reduce Fractions
Multiply and Divide on
Ecole Supérieure de Commerce de Neuchâtel
Pierre Marchal17.09.2015
http://creativecommons.org/licences/by/3.0/Attribute to: Pierre Marchal (Lycée Jean-Piaget)
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Objectives of the course
By the end of the course, you should be able to:– Factorize the numerator and the denominator– Identify the common factors– Reduce the common factors– Multiply and divide fractions
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Reduce Fractions
• To reduce fractions we
common
divide out
factors
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EXAMPLES OF APPLICATION
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3 83 5
=
Remember :First factorize Identify the common factorReduce the common factor
85
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6 86 3
=
Remember :First factorize Identify the common factorReduce common factor
83
Not allowed!
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PRACTICE EXERCISES
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Reduce the following fractions
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Multiply / Divide Fractions
• First common
Then multiply
• Division is the same, with one extra step at the start: by the
divide out
across
multiply
reciprocal
factors
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EXAMPLES OF APPLICATION
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=9
25
Remember:Factorize first Before reducingThen multiply across
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=1
4
Warning: when everything divides out the result is 1, not 0
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Exercises
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By the end of this course
• You are able to :– Factorize the numerator and the denominator– Identify the common factors– Reduce the common factors– Multiply and divide fractions
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Any question ?
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THANKS FOR YOUR ATTENTIONSee you on Monday and please learn your lesson !