Posted by Sarah on .
1 kilometer is equal to how many meters, centimeters, and millimeters?

Math 
Ms. Sue,
1km = 1000 meters
Each meter has 100 cm.
Each cm has 10 mm.
If you post your answer, we'll be glad to check it for you. 
Math 
Sarah,
1 km = 1,000 meters, 100,000 cm, and 1,000,000 mm?

Math 
DrBob222,
Looks good to me. Here is a site that may be of help to you.
http://physics.nist.gov/cuu/Units/prefixes.html