I started working on these three long division worksheets and their respective answer keys several months ago as part of a large remedial unit on basic operations in arithmetic. I just finished them this morning.
Let me say again that I am not a math teacher–and was not exactly a stellar math student–and leave it at that. OK, come to think of it, I will point you toward this article on “interleaving” in math instruction from the American Educator. When circumstances (which I hope never to confront again) compel me to teach math, I tend to use articles like that one to guide my planning.
If you find typos in these documents, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.