Question

1- Efetue as operaçoes :

A. (-5+3)+(-8-2)=
B.(+7+2)-(-9+11)=
C.(+6-4).(-8-9)=
D.(-10-20):(+4+1)=
E.(1/3+6/5)+(-9/4+1/6)=
F.(-3/5-6/8)-(-6/7+8/3)=
G.(-3/4+1/2).(-2/9-1/10=
H.(+3/5+4/6):(-1/6-1/2)=

Answer 1

Qnd tem o sinal de - na frente do parêntese muda o sinal de dentro
Ex: -(+)= -
-(-)=+
+(-)= -
+(+)=+