Question

(+8) +(-9) + (+7) + (-1)

Answer 1

8-9+7-1 =-1+7-1=6-1= 5

Answer 2

Olá,

Vamos lá,

= (+8) +(-9) + (+7) + (-1)
= 8 - 9 + 7 - 1
= 5

Resposta : 5