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ex:5 Simplificati prin 5 fractiile : 5 supra 10 ; 25 supra 15 ; 115 supra 85 ; 5n supra 55 ; 20n supra 10n + 5 .


Răspuns :

Simplific cu 5 !

5/10   = 1/2  ;

25/15 = 5/3  ;

115/85=23 /17 ;

5n/55 = n /11 ;

20n/(10n+5)=20n / 5(2n+1) = 4n/(2n+1) ;


5/10 = 1/2 ( prin 5)
25/15= 5/3  ( prin 5)
115/85= 23/17 ( prin 5)
5n/55= n/11 ( prin 5)