The mass of one pill is 889mg. What is the mass in kilograms of 100 pills

001mg=.001g=.000001kg Notice I placed the zeros on front of the milligrams so you can see the relation.

1 pill = 889mg so 100 pills=88900mg or 88.9grams

Now move the decimal place 6 times to the left like on the. 000001 kg.

88900 mg = 0.0889 Kg you can omit the zeros after the 9