The Formula dialog box appears as shown. The Table Tools tab in Word 16 If you cant see the Design and Layout sub-tabs click Table Tools at the top of your screen as shown. Insert a formula in a table cell Select the table cell where you want your result.
Typing the formula that you want to use in the formula box.
Keep the last column and last row empty. Typing the formula that you want to use in the formula box. You can type in the Formula box select a number. CtrlF9 will insert a pair.