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How to preview the second grade mathematics
The second grade math preview can do exercises, clever induction, literacy, formula calculation and so on.

This is the basis of preview. The first thing to do is to read the textbook, think while reading, clarify the concept, draw out the knowledge points and understand the main content. The process of preview is the process of seeking doubt. In the process of preview, you should mark the key points and difficulties with a pen, or you can write down your own understanding and experience in the blank space of the book or notebook.

If you don't understand, you should put a question mark or remark, so that you can listen to the class with questions and the classroom efficiency will be higher. Learning mathematics is naturally inseparable from formulas. Regarding the formula, some textbooks have a general derivation process, while others do not. Either way, it is suggested that students can try to derive the formula themselves when previewing.

This is very beneficial to cultivate children's ability to analyze and solve problems independently, or to guide children to discover their own knowledge defects. Usually, if you can't interpret, you won't make mistakes, either you don't understand enough knowledge, you haven't learned it, or you forget what you have learned. As long as you make up for it, you will make progress.

The knowledge of mathematics is continuous, and if the previous concepts are not understood, it will affect the study of subsequent courses. The teacher will not repeat what he has learned in class. If you don't understand it in preview, it will affect the efficiency of class. Many children don't understand in class, and the big reason is that they haven't cleared these "blind spots".

In the preview, if children have enough time, they can do examples in the textbook.

I lack the necessary knowledge of the new course, I don't understand it at all in class, and I won't understand it in the future. When previewing, once you find these "blind spots", you can check them yourself or ask your parents until you understand them. There will be a lot of theorems, laws, formulas, concepts, special symbols and so on. In mathematics learning, what are the very important knowledge points that need to be firmly remembered.

When previewing, we should separate these contents together, copy and summarize them regularly, summarize them constantly and deepen our understanding. For example, when previewing "positive and negative numbers", some children will sum up such a formula: 0 as the benchmark, left negative and right positive.