IDKLOL IDKLOL 23-01-2018 Matematică a fost răspuns 1.Efectueaza: a) 2/5+3/4 b) 3/7•(2/5+3/4) c) 3/7•2/5 d) 3/7•3/4 e) 3/7•2/5+3/7•3/4 2.Arata ca: 5/4•(1/3-1/2)=5/4•1/3-5/4•1/2