Real Number System Worksheet Answer Key. A worksheet, in the term’s original meaning, is usually a sheet of paper where one performs work. It is a printed page that a child finishes using a writing tool. No additional materials are necessary. It’s”a sheet of paper where work schedules, working time, special instructions, etc. are recorded. A bit or scrap of paper on which issues, ideas, or the like, are put down in tentative form.” In education, a worksheet may have questions for pupils and places to document responses. In accounting, a worksheet is, or has been, a sheet of paper with columns and rows where an accountant could record information or perform calculations.