1. Select Sum: you can select a row horizontally or a column vertically. By default, the sum of values will appear on the status bar at the bottom of the table.

2. Formula summation: excel's summation formula is sum. Enter =sum () in the result box, and then enter the numerical coordinates of the sum in brackets.

3. Select the sum field: click the cell, then click the "Sum" button on the menu bar, hold down the Ctrl key, click the cells that require sum, and then press ENTER to sum.

4. Sum function: Sum function is sum. If you don't know, you can click the "fx" icon above, select the mathematical function in the pop-up dialog box, and then select the sum function.