Răspuns :
11/18-4/9+5/6-1/3(aduci la același numitor)
11/18-(4•2/9•2)+(5•3/6•3)-(1•6/3•6)
Astfel obții
11/18-8/18+15/18-6/18
(11-8+15-6)/18=12/18
11/18-(4•2/9•2)+(5•3/6•3)-(1•6/3•6)
Astfel obții
11/18-8/18+15/18-6/18
(11-8+15-6)/18=12/18