Careful examination of questions is the premise of correct problem solving and accurate calculation. Primary school students' lax examination of questions leads to serious mistakes, on the one hand, because students have less literacy and low understanding level; On the other hand, he is eager to succeed in doing the problem and is unwilling to examine it.

Therefore, in teaching, teachers should guide students to understand the importance of examining questions and enhance their awareness of examining questions. At the same time, we should also teach students the methods of examining questions and establish the basic procedures for solving problems, such as examining questions-formulas-calculation-checking calculation-answering questions. And put the examination in the first place in the process of solving problems.

Second, cultivate the habit of careful inspection.

In the process of solving problems, we should cultivate the habit of careful inspection, which is the key to ensure the correctness of solving problems. Teachers should take checking calculation as one of the basic links in the process of solving problems. Strengthen training, strictly demand and urge students to do it, and explain to students what checking calculation is, as well as the method and significance of checking calculation.

Third, cultivate the habit of careful estimation.

Estimation is a shortcut to ensure the accuracy of calculation, but now many teachers think that estimation is rarely ignored as an examination content, which is very wrong. Teachers should seize every opportunity to consciously let students master the estimation method and guide them to discover some laws of sum, difference, product and quotient.

For example, 2040÷40, when estimating, take 2040 as 2000 and 2040÷40 as 2000÷40, which can be used to check whether the highest digit of calculation is correct and let students understand the importance of estimation.

Fourth, cultivate the habit of finishing homework independently.

There are many homework in primary school math class, and some students with strong ability can do it quickly and accurately. After they finished, they couldn't wait to report the methods and results of solving the problem. This makes some students who are slow to do the questions copy their own results without thinking. After a long time, these students have developed the bad habit of being lazy to think. Therefore, cultivating students' habit of completing homework independently is the premise for students to learn mathematics well.