In my eyes, elementary school mathematics is nothing more than addition, subtraction, multiplication and division. Where is the difficulty? I looked at it with self-righteous glasses, but it turned out that I was surprised. I didn't wake up when my son was in the first grade. Every time he does a problem, it is so simple, that is, addition and subtraction within 100. I think it is good for him to listen carefully in class and do his homework carefully. I have been taking the mid-term exam. I still adhere to the concept of happy learning. Why should I be so tired in the first grade? I should learn to have fun, although it is good.
It suddenly dawned on me: before, I always thought that the solution after class was that they didn't listen well in class. It turns out that they are adding nutrition. Fortunately, it's only half a semester, so I have to make up lessons for my son and buy consolidation exercises. Until now, my son keeps practicing after finishing his homework every day, and has developed the uncomfortable habit of not doing exercises. Although there are occasional small mistakes, making mistakes is a necessary part of consolidating exercises. I don't know how to correct my mistakes and what not to correct.
Today, I was confused by my son's question:
2 1÷3=(? ) means that 2 1 is divided into () parts on average, and each part is (), which means that 2 1 contains (? ) (? )。
The formula is simple, the first meaning is easy to understand, and the second meaning is not so easy. My son filled in 2 1, and there were three 7s in it. The answer is wrong. My husband was a master of mathematics at that time, and he talked to us for a long time, but he didn't understand. Obviously, her husband is "boiling jiaozi in a teapot-it won't pour out". I know in my heart that he is filling in seven 3s. How can he be reasonable? I was puzzled and had to ask my son's teacher. The teacher is very enthusiastic. The key is the meaning of 3, one is 3 copies, and the other is 3 copies each. I can help my children understand it by drawing. I understood immediately and told my son once. He also understood the logic, told me quickly, and recorded this discovery in the wrong book. ...
Through a small topic, not only let me understand the two meanings of division, but also let me put down my previous prejudice. Primary school mathematics is not simple, and even simple topics should be reasonable and reasonable, so that we can really understand them!
No longer despise primary school mathematics, study hard with my son! Overcome the problem with my son and meet the end of the term! Trust him! Come on!