Oral calculation is a kind of calculation method to calculate numbers directly without calculation tools. It is an important part of computing power. In daily life, it can be said that there is not a day when people don't have to do oral calculations, especially some simple decimal calculations. It is convenient, flexible and fast to calculate by mouth. Oral calculation is the basis of estimation and written calculation. For example, calculate 496×738=? In vertical calculation, this multiplication problem took 24 basic oral calculations! Poor oral calculation ability will inevitably affect the accuracy and speed of estimation and written calculation, and affect the form of calculation skills. When students do oral arithmetic, they should not only listen, but also watch, speak and calculate. In a sense, it is an organic combination of four senses: ear, eye, heart and mouth. Oral arithmetic can not only promote students' thinking, but also develop students' attention, understanding, memory and expression ability. Therefore, to improve students' computing ability, we must master the basis of oral calculation. After reading the relevant books, I gained some experience in improving pupils' oral arithmetic ability.

1, cultivate students' interest in mental arithmetic.

Interest is the best teacher. In the teaching of oral calculation, we should also stimulate students' interest in oral calculation, so that students can get happiness in oral calculation, thus continuously improving the accuracy of oral calculation. For example, games and competitions can be used to stimulate students' interest and improve their oral expression ability.

2. Enhance students' learning perseverance.

Oral arithmetic itself is boring, and over time, some students will have resistance. In teaching, students can be introduced to the stories of Chinese and foreign mathematicians. For example, Chen Jingrun, a famous mathematician in China, used several sacks of draft paper when studying Goldbach's conjecture. By introducing the deeds of mathematicians' hard work, students can be inspired to love their motherland and mathematics, set up lofty ideals from childhood, enhance their perseverance in learning, and cultivate their good quality of hard work.

3. Cultivate students' good habits

Good study habits are the guarantee to improve the accuracy of oral calculation. Therefore, try to correct students' learning attitude and cultivate students' good study habits in teaching. Of course, in teaching, we should also pay attention to the actual situation of students in this class, carefully analyze students' personality differences, correct mistakes in time, effectively prevent them, and persistently do a good job in oral arithmetic teaching, which will certainly gradually improve students' oral arithmetic ability.

4. Strengthen basic oral calculation.

Carry, add, subtract, multiply and divide within 20 minutes to make students achieve the proficiency of "blurting out without thinking", insist on oral arithmetic training for 3-5 minutes every day, and carry out targeted, purposeful and planned training in combination with the teaching content.

5. Pay attention to the analysis of wrong questions

When students make calculation errors, they must be guided to carefully analyze the causes of the calculation errors, find the root causes of the errors, and correct them in time. For some repeated mistakes, teachers can choose common typical mistakes and organize students to observe, think, analyze and communicate together. Through collective consultation, they can both "cure" and "prevent". Usually,

6. Paying attention to the cultivation of non-intelligence factors is the way to correct the calculation errors of primary school students.

In teaching practice, we will find the reasons why students make mistakes:

(1), the perception is not accurate.

Pupils' perception of things is general and rough, and they can only notice some isolated phenomena and can't see the connection between things. So their perception of things lacks integrity. When reading, reviewing and copying questions, they sometimes don't observe carefully, so the appearance they get is vague. At this time, perceptual errors distort the information, causing students to copy the numbers and symbols in the questions wrong. For example, write "35" as "53", write "+"as "-",copy one line and string it to the next, and so on.

(2) inattention

However, the development of primary school students in breadth, stability, attention transfer and distribution is still far from perfect. For example, when students are solving calculation problems, the teacher's sentence "Please write carefully" will distract students and lead to calculation errors. In addition, because of their short concentration time, they tend to lose sight of one thing and lose sight of another, and are prone to mistakes such as copying wrong numbers, writing wrong symbols and missing numbers.

(3), the interference of mindset

In calculation, students often use the usual methods to answer completely different questions, thus making mistakes. For example, when practicing the vertical calculation of decimal multiplication, the vertical calculation of decimal addition and subtraction will be used. Faced with this situation, countermeasures ② enhance students' learning perseverance.

In the usual teaching, I seldom do oral arithmetic exercises. Teaching practice has proved that the accuracy and speed of students' calculation are directly proportional to their oral calculation ability. Therefore, we must strengthen the oral arithmetic training in a down-to-earth manner.