in chapter mesaurmenthow to add 56mg 78kg Share with your friends Share 2 Priyanka Kedia answered this We know that, 1Kg=1000000 mgSo,78 kg=78000000 mgNow,58 mg+78 kg=56 mg+78000000 mg=78000056 mgThus,58 mg+78 kg=78000056 mg 0 View Full Answer Aarushi Singh answered this First change both the units so that they are same and then add= 56 mg + 78000000mg= 78000056 mg= you can convert!plz thumbs up! 1