The calculation and comparison of numbers must have exams, such as multiple-choice questions, fill-in-the-blank questions and big questions. If you choose multiple-choice questions, you may be given several numbers to judge which ones are positive, which ones are negative, or integers. What about filling in the blanks? It is possible to give you some figures for you to calculate. And big questions may also make you calculate, but for big questions, you have to write out the calculation process.