Question

help
(+4)-(-7)+(+9)-(-11)=
(+4)-(-38)+(+9)-(+2)=
(3+)-(-7)+(+9)-(+2)=

Answer 1

(+)(+)= +
(-) (-) = +
(+) (-) = -
(-) (+) = -

(+4)-(-7)+(+9)-(-11) = 4 + 7+9+11 =31

(+4)-(-38)+(+9)-(+2) = 4+38+9-2=49

(3+)-(-7)+(+9)-(+2)= 3+7+9-2= 17

Answer 2

(+4)-(-7)+(+9)-(-11)=
4+7+9+11= 31

(+4)-(-38)+(+9)-(+2)=
4+37+9-2= 48

(3+)-(-7)+(+9)-(+2)=
3+7+9-2= 17

Primero tenes q eliminar los paréntesis utilizando la regla de los signos, y luego terminar la cuenta

Suerte :)