Question

DAU COROANA!
Calculati:
a) -4-{-4-[-4-(-4+8)]-(+8-6)}
b) -15-{-10-[25-35-(10-15)]+25}
c) -50-{200-[100-50-(30-80+10)-80]-30}
d) -2-{-2-(-2+4)}-(-4-3)
e) (3-7+5)-(-12+5-7)
f) (7+8-9)-(2-5+8)-(-2-9+5)
g)(-35+18-24)-(8-14+10)-(-35+18)

Answer 1

a) -4-{-4-[-4-(+4)]-(+2)}=
    -4-[-4-(-4-4)]-2=
    -4-[-4-(-8)]-2=
    -4-(-4+8)-2=
    -4-(+4)-2=
    -4-4-2=
    -10
b) -15-{-10-[25-35-(10-15)]+25}=
    -15-{-10-[+25-35-(-5)]+25}=
    -15-[-10-(+25-35+5)+25]=
    -15-[-10-(-10+5)+25]=
    -15-[-10-(-5)+25]=
    -15-(-10+5)+25=
    -15-(-5)+25=
    -15+5+25=
    -10+25=
    +15
c)-50-{200-[100-50-(30-80+10)-80]-30}=
   -50-{200-[100-50-(-50+10)-80]-30}=
   -50-{200-[100-50-(-40)-80]-30}=
   -50-[200-(+100-50+40-80)-30]=
   -50-[200-(+50+40-80)-30]=
   -50-[200-(+90-80)-30]=
   -50-[200-(+10)-30]=
   -50-(+200-10)-30=
   -50-(+190)-30=
   -50-190-30=-260
d) -2-[-2-(-2+4)]-(-4-3)=
    -2-[-2-(+2)]-(-7)=
    -2-(-2-2)+7=
    -2-(-4)+7=
    -2+4+7=
    +2+7=+9
e)(3-7+5)-(-12+5-7)=
   (-4+5)-(-7-7)=
   +1-(-14)=
   +1+14=+15
f) (7+8-9)-(2-5+8)-(-2-9+5)=
   (+15-9)-(-3+8)-(-11+5)=
   +6-(+5)-(-6)=
   +6-5+6=
   +1+6=+7
g)(-35+18-24)-(8-14+10)-(-35+18)=
   (-17-24)-(-6+10)-(-17)=
    -7-(+4)+17=
    -7-4+17=
    -11+17=+6

Answer 2

..-(-(100-50-30+80+10-80)-30]=-50-(200-100+50+30-80-10+80-30)=-50-200+100-50--30+80+10-80+30=-250+100-50+10=-150+50+10=210
d)-2-{-2-(-2+4)]-(-4-3)=-2-[-2+2-4]+4+3=-2+2+2-4+4+3=5
e)1+12-5+7=15
f)6-2+5-8+2+9-5=7
g)-17-24-8+14-10+35-18=-49+49-10-18=-28