Never buy or create another subtraction worksheet again! This worksheet regenerates every time it is opened, creating a new worksheet every time! It is also customizable, giving you the option of choosing the range of numbers subtracted, whether or not to have regrouping in the problems, and whether to display the problems as columns, rows, or a mixture of the two. Each worksheet has 20 problems, giving the student plenty of space to show work. Other Customizable worksheets available, including Decimals, Fractions, and Integers!