For the Xueba clan, they mostly use reverse thinking to infer and verify the right or wrong of the selected answer through the answer. Such as exclusion method, limit thought, special figure method, special value method and so on. This not only saves time and effort, but also has high accuracy. Therefore, students must pay more attention to and use these shortcuts in peacetime.

Compared with solving problems, filling in the blanks can be said to be a question that the answer will win or lose, and only depends on the results. Sometimes you may calculate for a long time. Is it a pity that I got the wrong answer because of some small details? The most important thing is to waste a lot of precious time. Fill in the blanks is actually a small solution, so we must pay special attention to the details: symbols, decimal points and intervals.

brief introduction

Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.

Mathematics plays an irreplaceable role in the development of human history and social life, and it is also an indispensable basic tool for studying and studying modern science and technology.