This is a subtraction worksheet that allows the teacher/user to create an unlimited (infinite) number of unique worksheets with the touch of a button (F9). WITH CODED ANSWER KEY!This worksheet allows the teacher/user to control the difficulty of the problem by choosing the problem's parameters. As a result, this worksheet can be individualized for every type of learner. The teacher/user can also mass print/copy the same worksheet for an entire class or push out an electronic version to studen