The Spreadsheet Calculator allows you to edit the table data and perform calculations on sets with formulas.
The 109 formula functions that the June 2007 Open Document Format "Open Formula" specification calls the "small group" are available.

You can use the arrow keys and mouse to select cells in a manner similar to traditional spreadsheets. This includes using the shift key, as well as dragging. 
The program supports many forms of data, such as numbers, text, dates (e.g., "1/2/3"), dollars ("$1,234.50"), time ("3:45"), numbers with fractions ("1 1/2"), and "true", "false".