Question

(+72) + (-80) + (+50)

Answer 1

    $(+72) + (-80) + (+50)\\\\\left(72\right)-80+\left(50\right)\\\\-8+\left(50\right)\\\\42$

• Regla de los signos.-

• $+\left(-a\right)\:=\:-a$ , ($+\left(-80\right)=-80$)