#### Adding up a Column of Numbers:

*1. Selecting the Numbers*

1.1 Click on the first cell in the column.

1.2 Hold down the "Shift" key and click on the last cell in the column.

1.3 Alternatively, click and drag your mouse to select the cells.

*2. Click the "Sum" Button*

2.1 After selecting the cells, the "Sum" button will appear above the column.

2.2 Click the "Sum" button, and Excel will automatically calculate the sum.

*3. View the Results*

3.1 The sum will appear in a new cell below the column.

3.2 Right-click on the cell to format it as needed.

#### Adding up a Row of Numbers:

*1. Selecting the Numbers*

1.1 Click on the first cell in the row.

1.2 Hold down the "Shift" key and click on the last cell in the row.

1.3 Alternatively, click and drag your mouse to select the cells.

*2. Click the "Sum" Button*

2.1 After selecting the cells, the "Sum" button will appear above the row.

2.2 Click the "Sum" button, and Excel will automatically calculate the sum.

*3. View the Results*

3.1 The sum will appear in a new cell to the right of the row.

3.2 Right-click on the cell to format it as needed.

#### Adding up Multiple Rows or Columns:

*1. Selecting the Numbers*

1.1 Click on the first cell in the column or row.

1.2 Hold down the "Shift" key and click on the last cell in the column or row.

1.3 Alternatively, click and drag your mouse to select the cells.

*2. Click the "Sum" Button*

2.1 After selecting the cells, the "Sum" button will appear.

2.2 Click the "Sum" button, and Excel will automatically calculate the sum.

*3. View the Results*

3.1 The sum will appear in a new cell below the column or to the right of the row.

3.2 Right-click on the cell to format it as needed.

#### Adding up Non-adjacent Cells:

*1. Selecting the Numbers*

1.1 Click on the first cell you want to add.

1.2 Hold down the "Ctrl" key and click on additional cells.

1.3 Select all the cells you want to include in the sum.

*2. Click the "Sum" Button*

2.1 After selecting the cells, the "Sum" button will appear.

2.2 Click the "Sum" button, and Excel will automatically calculate the sum.

*3. View the Results*

3.1 The sum will appear in a new cell below the column or to the right of the row.

3.2 Right-click on the cell to format it as needed.

#### Adding up a Column/Row of Numbers with the Keyboard:

*1. Selecting the Numbers*

1.1 Click on the first cell in the column or row.

1.2 Hold down the "Shift" key and click on the last cell in the column or row.

*2. Press the "Alt" and "=" Keys*

2.1 After selecting the cells, press the "Alt" key and then the "=" key.

2.2 Excel will automatically calculate the sum.

*3. View the Results*

3.1 The sum will appear in a new cell below the column or to the right of the row.

3.2 Right-click on the cell to format it as needed.

#### Conclusion

****Congratulations! You've mastered the art of doing sums in Excel. Whether you're using the mouse or the keyboard, these step-by-step instructions will ensure you can efficiently add up columns, rows, or non-adjacent cells. If you have any questions or need further assistance, feel free to ask in the comments below. Happy calculating!