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calculati:14pe15-5pe18-1pe45

Răspuns :

14/15-5/18-1/45=
15=3×5
18=2²×3
45=3²×5
numitorul comun   2²×3²×5=180

=(14*12-5*10-1*4)/180=
=(168-50-4)/180=
=114/180=
=19/30