Question

calculo el resultado de cada operacion
18÷[12/(-12)]
(7÷2+4)-(2-5)
(7-2+4)-(2-5) 

Answer 1

18÷[12/(-12)]=
18÷(1/-1)=
18÷-1=
-18
________________
(7÷2+4)-(2-5)=
(3.5+4)-(-3)=
7.5+3=
10.5
________________
(7-2+4)-(2-5)=
(5+4)-(2-5)=
9-(-3)=
9+3=
12