The additive identity of rational numbers is _________ Share with your friends Share 0 Pabita Mahato answered this Dear student. Let a be any rational number. Then a+0=0+a=a. Hence 0 is the additive identity of rational number. Regards 0 View Full Answer Tathagat Dhaneriya answered this Your answer is: The additive identity of rational numbers is 0. Regards 0