Performing addition in Excel is fairly straightforward. You can either add numbers directly or use cell references to work ...

To add multiple columns, highlight the desired number of columns before ... right of where you want a new column. (Excel will insert the new column directly in front of it.) Select an entire ...

You can also add a row in Excel by right-clicking any cell ... Copy the numbers in the helper column, and then paste them directly below the last number within the same column.