How to Add (or Subtract) in a Spreadsheet like Excel

1. Open the Excel worksheet.
2. Enter the values in a row or column.
3. Click a cell to the right of the row of values or click a cell below the column of values. The selected cell displays a black outline.
4. Click the 'Home' tab.
5. Click the 'AutoSum' button in the 'Editing' group. This summation button displays the uppercase Sigma. A formula appears with the range of cells.
6. Press the 'Enter' key. The total appears in the selected cell.