Răspunsuri

Cel mai inteligent răspuns!
2014-10-02T21:44:41+03:00
a)(-1/9)+(+17/54)+(-11/6)+(+5/27)=(-1/9+5/27)+(17/54-11/6)=(-3+5)/27+(17-99)/54=
=2/27-82/54=(4-82)/54=-78/54=simplificam=-13/9=-1,(4)
b)(-9/10)+(-7/12)+(+19/30)+(+1/5)=(-9/10-7/12)+(19/30+1/5)=(-108-70)/120+(19+6)/30=
=-178/120+25/30=(-178+100)/120=-78/120=-13/20=-0,65
1 5 1