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calculati 17/3+15/2-8/3-7/2



Răspuns :

numitor comun=6
17/3+15/2-8/3-7/2=
(2*17+3*15-2*8-3*7)/6=
(34+45-16-21)/6=42/6=7
Amplificam fractiile ca sa aiba la numitor 6.
34/6+45/6-16/6-21/6=
=(34+45-16-21)/6=
=42/6=7.