How many milligrams do you think are in a gram? Explain.

Question

I know 1 gram=1000 milligrams but I don't know how I should explain it

Answer 1

The prefix milli- means one-thousandth.

Answer 2

http://www.thefreedictionary.com/milli-

Answer 3

1/2

Answer 4

The prifix milli holds the value 10-3(ten raise to power minus 3).
1 milli gram=1(10-3)