Data is stored and displayed in cells. A cell is addressed by column letter and row number. Your current cell address is displayed in the address box. You move around in the spreadsheet by clicking a cell with the mouse or using the tab or arrow keys.

## Entering data.

To enter data you will select a cell by clicking on it and then typing your data. What you are typing will show up in the entry bar. Press Return or Enter.

Hint: The X and check mark between the Address box and Entry bar can be used to cancel or accept an entry you've just typed.

There are three types of data in the spreadsheet shown above:

• titles (or text) in column A and in row 1,
• numbers in cells B3 through C6, and
• formulas in cells D3 through D10.

In the spreadsheet shown above, cell D3 has been selected. The formula in cell D3 can be seen in the entry bar. Formulas begin with an equal sign. Formulas use cell addresses like variables are used in algebraic expressions. The formulas in cells D4, D5, and D6 are similar to the formula in cell D3. The formula, =SUM(D3..D6) in cell D8, adds up the values in cells D3 through D6.

### Problem

Using the ledger example spreadsheet, find out how many pencils you can afford to buy if you have only \$10 and buy only one package of graph paper.

How many pencils can you buy?

Go on to Graphing

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