Question

resolva as expressões:

a) (-9)-(-9)-(-8)-(-8)

b) (-8)-(+2)-(-1)-(+6)

c) (-3)-(+5)-(-8)-(+3)-(-2)

d) (+12)-(-12)-(-13)-(+13)

e) (+7)-(+2)-(-4)-(-5)-(+8)

Answer 1

Olá,

Vamos lá,

a) (-9)-(-9)-(-8)-(-8)
= -9 +9 +8 +8
= 16

b) (-8)-(+2)-(-1)-(+6)
    - 8 - 2 + 1 - 6
    -16 +1
    -15

c) (-3)-(+5)-(-8)-(+3)-(-2)
= -3 - 5 +8 -3 + 2
= -11 +10
= -1

d) (+12)-(-12)-(-13)-(+13)
= 12 + 12 + 13 -13
= 24

e) (+7)-(+2)-(-4)-(-5)-(+8)
= 7 - 2 + 4 + 5 - 8
= 6