50 worksheets at various levels of, addition, subtraction, multiplication and division, answers to each worksheet are on the following page with the exact same format. All questions in all publications are different. Worksheets that are more engaging than basic numbers and answers. With the majority providing opportunities for higher order thinking skills (HOTS). All worksheets have an answer sheet in the same format, which eases marking, as marking can be done almost at a glance. Parents can easily use the books as, write in, books. Easily assessing their children's performance. Even if they are not confident with mathematics.