In [[mathematics]], signs can refer to the [[symbol]]s of [[addition]], [[subtraction]], [[multiplication]] and [[division]] as well as some more advanced operations. The sign of a [[number]] refers to whether it is [[positive]] or [[negative]]. | In [[mathematics]], signs can refer to the [[symbol]]s of [[addition]], [[subtraction]], [[multiplication]] and [[division]] as well as some more advanced operations. The sign of a [[number]] refers to whether it is [[positive]] or [[negative]]. |