Accessing numbers spreadsheet across devices yet be able to work on it offline
I have a MacBook Pro with OS X Maverick and Numbers 3.0. I have a numbers file which I want to keep on my MacBook so I can work on it when not connected to the internet. However I thought that Maverick (when connected to the internet) would automatically put a duplicate on iCloud which could then be accessed by by other devices (as well as directly via the Web). However that does not seem to be the case. I tried uploading the file to iCloud (by moving the icon to the index on the web) and succeeded, but that copy is independent from the one on my Mac and does not update when I make changes on the one on my hard disk. I tried "moving" my file to the Web, and that worked, except that it disappeared from my hard disk. Is there a way to have a spreadsheet that synchs across devices, but is also accessible when not connected to the web?
MacBookPro3.1, Mac OS X (10.5)