You can perform calculations that span across more than one table in a text document.
Open a text document, insert two tables, and type numbers in a few cells in both tables.
Place your cursor in an empty cell in one of the tables.
In the \<emph\>Formula Bar\</emph\>, enter the function that you want to perform, for example, "=SUM".
Click in a cell containing a number, press the plus sign (+), and then click in a different cell containing a number.