Question

Va rog din suflet ,dau coroana !

Answer 1

c) =1/2+1/30-(15-1)/90=
=[(15+1)/30]-14/90=
=16/30-14/90=
=(16x3-14)/90=
=(48-14)/90=
=34/90=simplificam=17/45=0,3(7)

d)=(3/9:6/10)+(1/4-5/10)²=
=(1/3x10/6)+[(10-20)/40]²=
=10/18+(-10/40)²=
=5/9+(-1/4)²=
=5/9+1/16=
=(5x16+9)/144=
=(80+9)/144=
=89/144=0,6180(5)

e)={[(145/12+1/10+4/15)x15-6x28]x4/11}:[(5x12/5-179/22):85/2]=
={[(14x5+6+4x4)/60x15/1-168]x4/11}:[(12-179/22)x2/85]=
={(92/60x15/1-168/1)x4/11}:[(12x22-179)/22x2/85]=
=[(92/4-168)x4/11]:[(264-179)/11x1/85]=
=[(92-168x4)/4x4/11]:(85/11x1/85)=
=[(92-672)/1x1/11]:1/11=
=-580/11x11/1=
=-580