[users] simple addition

I'm using the calc program to do a simple spreadsheet and I can't get it to add numbers. I've tried 6+5 and hitting enter and it doesn't work, as my interpretation of the help instructions indicated it would. What am I doing incorrectly? Thanks.

[users] help running open office

I just installed everything, but can't discover how to actually open the software and run the programs. Any hints? Rich _ Interest Rates near 39yr lows! $430,000 Mortgage for $1,399/mo - Calculate new payment