The calculation of fractional division is written as follows: dividing one number by another (except 0) is equal to multiplying the reciprocal of this number.

Maybe my classmates often make mistakes in the calculation with me, either forgetting to change the divisor into the multiplication sign or forgetting to change the divisor into the reciprocal. Obviously, a simple question failed. I was very upset about this, so I recited the rules repeatedly, but there were still mistakes. I have to think of a way. I scrutinized this rule repeatedly and found two changes. One is the divisor changing the sign, and the other is the divisor changing the reciprocal. Why not use "two changes" to summarize it! One symbol, two reciprocal! From now on, there will never be so many mistakes in my fractional division.

After finding the learning tips, I became more interested in the subject of mathematics. Especially when I come across long and complicated concepts and rules, I always calm down and think about what is the most important of this rule, which embodies several key points, and then summarize it by drawing pictures, making up jingles or short words, so that it is easy to remember.

After learning the knowledge of cylinders and cones, I learned to draw pictures in order to better grasp and distinguish the characteristics and calculation formulas of cuboids, cubes, cylinders and cones. When the graphics are drawn, their respective characteristics will be clear at a glance. At the same time, it will be marked with letter formula and combined with pictures and texts, so that it will not be confused, and the effect will be hundreds of times stronger than memorizing the roof.

Students, maybe you have a better way to help your study than I do. Can you tell me something about it?