To insert a single column: Right-click the whole column to the right of where you want to add the new column, and then select Insert Columns. To insert multiple columns: Select the same number of …

If you need to sum a column or row of numbers, let Excel do the math for you. Select a cell next to the numbers you want to sum, select AutoSum on the Home tab, press Enter, and you're done.

One quick and easy way to add values in Excel is to use AutoSum. Just select an empty cell directly below a column of data, then on the Formula tab, select AutoSum > Sum.

To insert a column, pick any cell in the table and right-click. In the example shown below for rows, a row will be inserted above row 3. For columns, if you have a cell selected in the table's rightmost column, …

To add a list of numbers, select the cell below a column of numbers, and then click AutoSum.

You can quickly total data in an Excel table by enabling the Total Row option, and then use one of several functions that are provided in a drop-down list for each table column.

Insert a new column into the table. You can do this by typing in the column immediately to the right of the table, and Excel will automatically extend the table for you.

Note: In Excel, select a row or column that you want to delete, right-click and select Delete , and choose the option you want. Or select a cell, and then select Home > Insert or Home > Delete, and then …

Adding and subtracting in Excel is easy; you just have to create a simple formula to do it. Just remember that all formulas in Excel begin with an equal sign (=), and you can use the formula bar to create them.

You can use AutoSum to quickly sum a column or row or numbers. Select a cell next to the numbers you want to sum, select AutoSum on the Home tab, press Enter (Windows) or Return (Mac), and that's it!