I followed apples direction about the icloud drive and did not activate it. And I still have found that I can not synch between my iphone and my mac as before the update. Any idea's why?
Are you using iOS 7 or iOS 8 beta 4 on your phone?
Just iOS 7.
Your best bet to keep using Numbers while on Yosemitie is to go through icloud.com. I haven't tested iOS to iCloud syncing yet, but editing on iCloud.com and then syncing to the iOS works just fine.
However, I am also running iOS 8 beta 4 on my 5C. Don't know if it works with iOS 7.