Calculation drill sets for elementary school students, sets for 5th and 6th graders. They are print-style, designed to be torn off one sheet at a time. As shown in the second photo, some of the 7 books have only a few pages remaining, while others are almost untouched. We are looking for buyers who want to use these for things like: - Doing a few sheets a day as a daily routine - Simply solving problems relentlessly We look forward to doing business with you. *Please note that there is a possibility that the answer sheets may be mixed up or missing. We appreciate your understanding.