👤
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