Question

am nevoie rapid dau coroana. Ex 11​

Answer 1

a) (-2)(+1)+(-2)(-3)+(-3)(+4)+(-4)(+5)=

= -2+6-12-20=

= -34+6=

= -20

b) -6•[-5-4•(-3-2)-1]=

= -6•[-5-4•(-5)-1]=

= -6•(-5+20-1)=

= -6•14=

= -84

c) 400-5•[(-24+3•5)-4•(12-15)]=

= 400-5•[(-24+15)-4•(-3)]=

= 400-5(-9+12)=

= 400-5•3=

= 400-15=

= 385

d) (-3-5+8)•(7-2)=

= -3(7-2)-5(7-2)+8(7-2)=

= -21+6-35+10+56-16=

= -72+72=

= 0

e) -3+(-2+7)(-3)-(-9)•0+(-1+8-7+10)•(-10)=

= -3+5(-3)-0+10•(-10)=

= -3-15-100=

= -118

f) -3•[-2+(-5+4-0)•(-4)-(9-7)•3]-(-2)(-3)=

= -3(-2-1•(-4)-2•3)-2•3=

= -3(-2+4-6)-2•3=

= -3•(-4)-2•3=

= 3•4-2•3=

= -3(-4+2)=

= -3(-2)=

= 6