the default for metric dims is to truncate (omit) trailing zeroes. I believe this is part of the ANSI drfting standards. if you want to change it, go to the document properties->dimensions and change the trailing zeroes setting.
Go to Options>Document Properties
You'll see a selection box there for leading and trailing zeroes, set trailing zeroes to show, or at least something other than hide.
I was having the same problem and after searching the net couldn't find any solution that worked for me. After searching through the myriad of Options> Document Properties I finally discovered there are two separate locations to indicate how to treat Trailing Zeroes. The first is under the "Annotations" settings, the second is under the "Dimensions" settings, try experimenting with both and you should be able to get the results you are looking for.