Question

Calculati :
b)[(3-2+1)-(-5-4+7)-(+4)]-[7+(-3-2+4)-(-4+3+1)+(-6)]=?
c)-5- {-1+[-3+(-5-2)]-[-4-(-7-4)+(-3+7)]-2}=?
d)4+{1-[2-(-5-1)+(-3+2)][-2+(2-5)-(-3+5)]-4}=?

Answer 1

b)[(3-2+1)-(-5-4+7)-(+4)]-[7+(-3-2+4)-(-4+3+1)+(-6)]=
=(2+2-4)-(7-1-6)=0

c)-5- {-1+[-3+(-5-2)]-[-4-(-7-4)+(-3+7)]-2}=
=-5- [-1+(-3-7)-(-4+11+4)-2]=
=-5- [-1-10+11-2]=
=-5+2=-3

 d)4+{1-[2-(-5-1)+(-3+2)][-2+(2-5)-(-3+5)]-4}=
=4+[1-[(2+6-1)(-2-3-2)-4]=
=4+[1-[(7)(-7)-4]=
=4+1+49-4=
=50

Answer 2

b) [1-(-3)-(+4)] - [7+(-1)+(-6)] = 1+3-4 = 0

c) -5 - [-1+(-3)+(-7)] - [-4-(-11)+4]-2 = -5-(-11) - 11 -2 = -7

c) 4+ {1-[2-(-6)+(-1)] [-2+(-3)-2]-4} = 4+[(1-9)(-7)-4] = 4+56-4 = 56