Apple iWork '09 - Manual (Page 18)

Using Predefined Quick Formulas
An easy way to perform a basic calculation using values in a range of adjacent
table cells is to select the cells and then add a quick formula. In Numbers, this is
accomplished using the Function pop-up menu in the toolbar. In Keynote and Pages,
use the Function pop-up menu in the Format pane of the Table inspector.
Sum: Calculates the sum of numeric values in selected cells.
Average: Calculates the average of numeric values in selected cells.
Minimum: Determines the smallest numeric value in selected cells.
Maximum: Determines the largest numeric value in selected cells
Count: Determines the number of numeric values and date/time values in selected cells.
Product: Multiplies all the numeric values in selected cells.
You can also choose Insert > Function and use the submenu that appears.
Empty cells and cells containing types of values not listed are ignored.
Here are ways to add a quick formula:
To use selected values in a column or a row, select the cells. In Numbers, click Function
m
in the toolbar, and choose a calculation from the pop-up menu. In Keynote or Pages,
choose Insert > Function and use the submenu that appears.
If the cells are in the same column, the result is placed in the first empty cell beneath
the selected cells. If there is no empty cell, a row is added to hold the result. Clicking
on the cell will display the formula.
If the cells are in the same row, the result is placed in the first empty cell to the right
of the selected cells. If there is no empty cell, a column is added to hold the result.
Clicking on the cell will display the formula.
To use
m all the values in a column’s body cells, first click the column’s header cell or
reference tab. Then, in Numbers, click Function in the toolbar, and choose a calculation
from the pop-up menu. In Keynote or Pages, choose Insert > Function and use the
submenu that appears.
The result is placed in a footer row. If a footer row doesn’t exist, one is added. Clicking
on the cell will display the formula.
18 Chapter 1 Using Formulas in Tables