You're going along, minding your own business, doing your spreadsheet. You print. Ten minutes later the irate printer guy comes along, saying "Would you mind not printing 200 pages at once????"
You're irritated since you just....well, you just MEANT to print the current sheet which has three pages.
But when you click Print or choose File > Print and don't modify this in any way, you print the WHOLE spreadsheet. Possibly including blank pages.
There are several ways to change this.
To print only the current sheet by default and prevent any blank pages from printing:
Choose Tools > Options > OpenOffice.org Calc > Print.
Select both options shown. Click OK. Now only the current sheet will print, and no blank pages will be printed.
To do this on the fly for each time you print.
Choose File > Print, click Options, then set the options in the options window that appears. This will make the change only for the current print job.