Răspuns :
3/4 kg = 3/4 x 1000 = 750g
3/4 kg +250g = 750g + 250g =1000g
3/4 g = 3/4 x 1000 = 750 mg
3/4g +120mg = 750mg +120mg = 870mg
3/4 kg +250g = 750g + 250g =1000g
3/4 g = 3/4 x 1000 = 750 mg
3/4g +120mg = 750mg +120mg = 870mg