Răspuns :
1/2+1/3=3/6+2/6=5/6
5/6+1/4=20/24+6/24=26/24
26/24+1/5=130/120+24/120=154/120
154/120+1/6=924/720+154/720=1078/720
5/6+1/4=20/24+6/24=26/24
26/24+1/5=130/120+24/120=154/120
154/120+1/6=924/720+154/720=1078/720