First, clear the purpose of oral calculation, to stimulate a strong interest in oral calculation
The verbal calculation is also satisfactory. It is a calculation method that directly calculates numbers without using calculation tools, mainly relying on thinking and memory. The new syllabus points out that oral calculation is not only the basis of written calculation, estimation and simplification, but also an important part of calculation ability. "If you want to pass the calculation, you must pay attention to oral calculation", which is a scientific conclusion and the law of primary school mathematics teaching. Therefore, in order to improve students' oral arithmetic ability, we should not only cultivate their interest in oral arithmetic, but also clarify their purpose. Students need to concentrate, memorize numbers, choose algorithms and carry out nervous thinking operations in their minds when doing oral arithmetic, so oral arithmetic can promote the development of students' attention, memory and thinking ability. It can be seen that to cultivate students' computing ability, we must first start with oral computing ability.
Second, cultivate students' good habits of oral arithmetic.
In order to better improve students' computing ability and cultivate children's interest in oral arithmetic, vivid and interesting oral arithmetic can be adopted. This is very important for children in lower grades. If a single way is often used for oral arithmetic training, it will inevitably make them feel bored, inattentive and ineffective. According to the characteristics of junior two students, we use "oral arithmetic practice every day" to enter the classroom. Cultivate students' good habit of oral arithmetic.
Starting from the project experiment, we practice oral arithmetic for 3 minutes in class every day instead of training under the supervision of the teacher. It takes 5 minutes to complete and correct the 10 question in class. Students' verbal ability is really not good, the speed can't keep up, and there are many mistakes. After a semester's study, students' oral arithmetic habits have changed obviously. Now before class, the group leader has distributed it to every child, who can be a teacher and organize students to review, and the number of students has changed from the original three. The speed of oral calculation has improved a lot, and the accuracy of oral calculation has increased from 70% to over 95%.
Third, it has various forms to enhance the interest.
As the saying goes, "Interest is the best teacher". Simple oral arithmetic practice is boring for children in Grade Two. How can we improve their interest in learning and enhance their verbal ability? According to the characteristics of senior two students, students are young, it is not easy to concentrate for a long time, and the unintentional and emotional characteristics of learning are obvious. We can work hard on the diversity and fun of practice forms, improve the operability of practice, enhance the playfulness, challenge and fun of practice, and make learning full of fun. Make students always keep a strong interest in oral arithmetic. At the same time, according to the characteristics of teaching materials:
1. Play interesting games.
Our teachers should actively use their brains, design various games that students like to play to train oral arithmetic, and often change the game forms to enrich oral arithmetic practice. When training addition and subtraction within 20 minutes, you can often use games such as running a train relay, finding friends, helping small animals find homes, picking fruits and so on to calculate oral math problems. For example, when learning table multiplication, you can use passwords and nursery rhymes; For example: 1 frog 1 mouth, 2 ears, 4 legs, 2 frogs, 2 mouths ... Students can also create nursery rhymes with animals such as crabs and bees. During the game, they are interested in learning and gradually make students proficient.
2. Carry out challenging competitions.
Junior students are generally aggressive, enthusiastic about the competition and eager to express themselves. Teachers can organize various forms of competition exercises in the classroom in a timely, moderate and appropriate manner, and often use quick calculation, winning the red flag, group competition, quick answer competition, limited time competition and so on. To further stimulate students' fighting spirit. Our teachers can also play an innovative role and create more novel activities by using the materials in life. For example, "who is right with the teacher", and at the same time, activities such as answering first, verbal relay race and verbal contest are also carried out to improve students' interest. With the variety of forms, children's interest in arithmetic is naturally stronger.
Fourth, attach importance to mathematics teaching and speed up oral calculation.
Teaching facts show that the speed of oral calculation is fast, the speed of written calculation is also fast, and the correct rate is high, otherwise it will be poor. In the teaching of oral calculation, the main way for students to effectively master the basic methods of oral calculation is to teach students to understand oral calculation, and flexible use of oral calculation methods can deepen students' understanding of oral calculation. Therefore, in teaching, I not only teach students correct and reasonable algorithms, but also attach great importance to the teaching of arithmetic. For example, in the teaching of abdication subtraction within 20, first ask: "How much is 17 MINUS 8?" The students scrambled to answer, "It's equal to 9." I asked again, "How did you come up with it?" The student said, "Because 9+8 = 17, it is 17-8 = 9". I sum up this method as "doing subtraction and adding". Further guidance: "Can you think of other solutions to this problem?" At this time, the students immediately became interested, and everyone was actively thinking. After a while, a student said, "I think so." Let's first calculate 10-8 = 2, and then calculate 2+7 = 9. " Another student said, "I think so." Let's calculate 17-7 = 10, then 10- 1 = 9. " At this time, the students' ideas came alive and their interest was aroused. Everyone wants to show their talents. After the students finished speaking, I showed them different abdication subtraction methods in time, and asked the students to talk about the oral calculation process of different ideas. When I was studying division, I asked my students to transfer the method of multiplication and write the formulas of two multiplication and two division into one formula (7×9=63 9×7=63 63÷7=9 63÷9=7). At this time, the students' ideas came alive, their interests were aroused, and they all scrambled to speak and tried to show their talents. After the students finished speaking, I showed different concessions in time. Through reasoning training, the method comes alive and the speed of oral calculation is accelerated.
Through reasoning training, the method comes alive and the speed of oral calculation is accelerated.
Strengthening oral arithmetic practice is an important method to improve oral arithmetic ability.
Now I teach senior two, so every time I need students to report oral answers, I ask them to report which multiplication formula he used to solve this formula. Before class every day, I will combine the content of this class with the necessary oral arithmetic training. Students in our class have a time trial of verbal calculation every day. Do 80 questions every day 10 minutes. After completion, the deskmates will review and revise each other. This semester, the school will hold a grade "king of verbal arithmetic" contest to test the real questions and judge the "king of verbal arithmetic". These children/kloc-can reach more than 200 words in 0/5 minutes, which is really worthy of being the "king of verbal arithmetic". This has a great auxiliary effect on improving oral calculation ability.
Sixth, the combination of home and school, * * * and the cultivation of children's speech ability.
If parents want their children to have quick reaction ability, staying at home for a few minutes every day during holidays will get twice the result with half the effort. At the same time, parents should encourage their children to participate in necessary social practice activities. For example, it is also an effective way for children to go shopping with their parents and help them calculate the money they need, which can also stimulate and cultivate children's interest in learning mathematics.
As we all know, the importance of cultivating the ability of oral calculation is well known. Everyone is thinking about how to improve children's verbal ability. There are really all kinds of ways. Perhaps even a simple "3 minutes a day" will let us see unexpected results. But in any case, it is still necessary to give priority to peacetime, and the important thing is to persist!
Hope to adopt, thank you!