Odpowiedzi

2009-11-17T19:34:01+01:00
=(½-⅔)+(½-¾)+(3/6-1/6) = (3/6-4/6)+(2/4-3/4)+2/6= (-1/6)+(-1/4)+2/6= (-2/12)+(-3/12)+4/12=-5/12+4/12=-1/12
2009-11-17T19:41:16+01:00
[1/2-(1-1/3)]+[1/2-(1-1/4)]+[1/2-(1-1/6)]=
=[1/2-2/3]+[1/2-3/4]+[1/2-5/6]=
=[3/6-4/6]+[4/8-6/8]+[3/6-5/6]=
=-1/6+(-2/8)+(-2/6)=
=-4/24+(-6/24)+(-8/24)=
=-18/24= -9/12= -3/4

Wynik:-3/4