You first want to convert all to the same unit, so lets convert them to grams 30g= 30g 3000cg = (3000cg/100)= 30g 30dg= (30dg/10)=3g 0.30kg= (0.30kg*1000)=300g So 30dg contains the smallest amount of matter
Well, Moorelyssa, the answer to that question is:30 g = 0.03 kg 3000 cg = 30g = 0.03 kg 30dg = 300g = 0.3 kg 0.3kg = 0.3 kg Answer is 30g and 3000cg have the least matter. Your welcome!