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Solution 1.2:3a

From Förberedande kurs i matematik 1

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The denominator in the expression has 10 as a common factor,


3210+7510−110


and it is therefore sufficient to multiply the top and bottom of each fraction by the other factors in the denominators in order to obtain a common denominator,


35205+72502−1521052=15100+14100−10100


The lowest common denominator (LCD) is therefore 100 , and the expression is equal to


15100+14100−10100=10015+14−10=19100

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