1, reading questions (text or graphic cognitive ability)

2, thinking (logical thinking ability)

3, column link (ability to master basic concepts or formulas)

4, the calculation link (computing power)

5. Inspection link.

The fourth link is called "calculation", and the sum of the third and fourth links is called "operation".

According to the analysis of "carelessness" in the above five links, the following four reasons can be summarized:

First, the "carelessness" caused by visual dislocation.

This kind of mistake is because children are not sensitive enough to similar numbers or symbols, so they often copy the wrong data and symbols. In the process of reading questions or columns, I read the wrong numbers, write the wrong symbols, write the wrong units, and so on. Countermeasures: practice more every day, such as taking a look at dad's mobile phone number and then asking to repeat it. In order to strengthen attention and improve short-term visual memory ability.

Second, the attention problem caused by "carelessness"

Many children don't pay enough attention when doing problems, or they can't pay attention at all (because they didn't develop good study habits when they were young), so they are prone to mistakes in all aspects, such as mistakes in examining problems, mistakes in formulas, careless calculations and so on. Countermeasures: Attention is a big problem for children to learn, so short-term and long-term attention training should be carried out from an early age. For example, ask students to read a text for 3 minutes, and then repeat what they say (in as much detail as possible).

Third, the "carelessness" caused by wrong inertia thinking.

The concept of knowledge instilled for the first time must be correct, because "the first time" is the most obvious stimulus to the brain. If there is any omission or misunderstanding of knowledge, it needs to be corrected in the process of practice, and the wrong idea cannot be repeated more than three times, otherwise it is easy to develop the wrong inertial thinking. Countermeasures: correct mistakes in time and correct them in time. For example, the teacher requires that there must be a wrong book, and you should always look through it.

4. "Carelessness" caused by unskilled basic concepts or formulas