Question

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

b) (-2)-(-4)-(+7)-(-2)+(-12)

c) -20:{-6+[(-2).(-3):(+2)]-2}

d) 10-{-6+[(-12):(-3)-8]}

e)[(-2)⁴+3(3²-1)]:(-2³+3.2²)

Ficarei muito grato!

Answer 1

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

B)(-2)-(-4)-(+7)-(-2)+(-12)
   -2+4-7+2-12 = -15

C) -20:{-6+[(-2).(-3):(+2)]-2}
   -20:{-6+[6:2]-2}
  -20:{-6+3-2}
  -20:(-5) = 4

D) 10-{-6+[(-12):(-3)-8]}
     10-{-6+[4-8]}
     10-{-6-4}
      10+10 = 20

E) [(-2)^4 +3(3²-1)]:(-2³+3.2²)
     [16+3.9-1]:(-8)+3.4
     [16+3.8]: (-8)+12
     [16+24]: 4
     40:4 = 10