Primary school computing power content

1. Research on how to improve the ability of mathematics calculation in primary school. But in the course of this year, I deeply realized that if a child's computing ability is not strong, it will have a great impact on the child's overall math performance. So in the usual teaching, we should pay attention to the cultivation of students' computing ability. But how to cultivate students' computing ability? I would like to express my opinion:
first, master the "addition and subtraction method within 10" and "addition and subtraction method within 20". As a key starting stage, elementary learning of addition, subtraction, multiplication and division will have a profound impact on students' further learning. Teaching practice tells us that any complex problem is composed of a simple problem. Whether it's two digit multiplication and division, or two digit multiplication and division, or three digit, or other more complex calculation problems, their basis is "addition and subtraction within 10", "addition and subtraction within 20" and "99 multiplication formula". If these basic knowledge is not up to the standard and can't reach the level of blurting out without thinking, it will affect the later complex operation and reasoning. If you don't have a good command of "addition and subtraction within 10", "addition and subtraction within 20" and "nine nine multiplication formula", you will not be able to calculate quickly and accurately in the middle and senior grades< Second, strengthen the training of oral arithmetic ability Primary school mathematics syllabus pointed out: "to cultivate students' computational ability, we should pay attention to the basic training of oral arithmetic. Oral arithmetic is not only the basis of written arithmetic, estimation and simple calculation, but also an important part of computational ability."
only when the ability of oral calculation is strong, can the speed of written calculation be accelerated and the accuracy of calculation be improved. The teaching content of lower grades is relatively less. The teacher can time the children in class and let them do it. At this time, the students' attention is very focused, and it will also effectively improve the students' computing speed. It can also take the form of competition to read and calculate, which can often mobilize the enthusiasm of students, but this requires the teacher to have a clear idea of each child's level. Oral arithmetic is not only to time, more important is to give children to see right and wrong, for those who can test within the specified time to give a certain reward in time, cause students to pay attention to oral arithmetic, so as to improve the ability of oral arithmetic< Third, we should pay attention to the accumulation of wrong questions.
students' learning is a process of repeated understanding and practice, and mistakes are always inevitable. Especially for the younger students, the knowledge they just learned is easy to forget. Therefore, teachers should timely understand the problems existing in students' calculation, deeply analyze the causes of their calculation errors, and carry out targeted teaching. Teachers should focus on the analysis of the reasons for the wrong questions according to the person and the topic. Most students have done the wrong questions, so teachers should focus on explaining and analyzing the reasons for the mistakes; For students with poor foundation and often making mistakes, teachers should spend more time in tutoring after class. Students should reflect on the mistakes in their oral arithmetic. Each student should prepare a book, record the mistakes in the daily homework in the book, and write down the mistakes and correction methods. In addition, it is necessary to take the students' frequently wrong questions and similar questions as the students' classroom test, and feedback again to understand the students' learning effect after correcting the mistakes. The practice of correcting wrong questions requires students to judge right and wrong, find out the mistakes, analyze the causes of mistakes, and correct them. The class adopts the form of a little doctor to find the cause of disease competition, so that students can acquire knowledge in the competition“ "Correcting mistakes" can not only satisfy students to distinguish the causes of mistakes and correct them, but also achieve the effect of prevention< Fourth, help students understand the principles of calculation and reveal the rules.
in the teaching of calculation, let students understand the principles of calculation and know not only what they are, but also why they are. In this way, the teaching of calculation will become lively and colorful. Low grade students' intuitive thinking is dominant, and they graally transition to abstract thinking. Psychologists believe that thinking starts from action. To enable students to master mathematical knowledge and promote the development of thinking, it is necessary to build a bridge between image thinking and mathematical abstraction, and give full play to the role of learning tools. In the teaching of 9 plus a few, students can ask for a stick to study together. In the students' independent operation, we can optimize the ten methods, which will lay the foundation for further study of carry plus and abdication minus. We can also make use of students' existing knowledge and experience to understand new knowledge, construct the main way of teaching knowledge structure, properly use old knowledge in teaching, assimilate new knowledge through analogy, and realize the positive transfer of knowledge, which is concive to students' understanding of new knowledge and recognition of new knowledge structure. For example, if you want to add, calculate and subtract, students will continue to learn through the connection between knowledge. Let students understand thoroughly, they can use the method of calculation correctly and skillfully< Fifth, cultivate the junior students to develop good calculation habits
good calculation habits directly affect the formation and improvement of students' calculation ability. Many students can understand and master the algorithm, but they often make mistakes, mainly e to the lack of strict training and good learning habits
to improve students' computing ability, we must pay attention to the cultivation of good computing habits. Make students form the habit of proofreading carefully. The students are required to proofread the copied topics carefully, ranging from numbers and symbols, so as to make sure they are good. Make students form the habit of examining questions. Students are required to see each data and operation symbol clearly, determine the operation order, and choose a reasonable operation method. Make students form the habit of careful calculation and standard writing. Students are required to write neatly and the writing format should be standardized. At the same time, those who can do it by mouth should do it by mouth, while those who can't should do it by hand. In column vertical calculation, the number of digits should be aligned, and there should be an appropriate interval between the numbers. Make students form the habit of estimating and checking consciously. Teachers should teach students the methods of checking and estimating, and make strict demands on checking as an important part of the calculation process. It is advocated to use estimating to check the correctness of the answers
computing teaching is a long-term and complex teaching process, and it is not a matter of one day to improve students' computing ability. As the saying goes, if you want to develop a good skill, you must keep your fists together and keep your tongue in tune. So is the cultivation of oral arithmetic ability. It is a cumulative process, only the joint efforts of teachers and students can be effective.

2. Remember the slave mines? Remember when it became a vehicle unit? The slave mine is a change car, and the Allied mine is certainly sold! Are you a league mine based on slave mine data? If you delete the mine which is far away from the mine, the mine will be deformed.

3. If you want to make money quickly,

① Myrica rubra and lemon (recommended)

② peanut, pear, longan, mango, rian, guava, blueberry and Mangosteen (conservative recommended)

③ high-grade crops (most recommended)

the first formula is not very different, relatively speaking, the output value of Myrica rubra is higher; It should be noted that the gold coins obtained from these two crops are the highest among all crops when they are not stolen; But in the case of being stolen, the gold coin is the lowest of all crops. The Myrica rubra was sown at 8 a.m., 15 a.m. on the second day, 5 a.m. on the third day, 19 a.m. on the third day, 9 a.m. on the fourth day and 23 a.m. on the fourth day; Because there are five seasons,
no matter how it is arranged, one season will mature at night, so the sowing time is not listed one by one

the second formula is suitable for people who are on-line from time to time and have an irregular harvest. After the first few peanuts are reced to the last few, they get the highest profit, and so on; The bamboo in the back is the most profitable, while the bamboo in the front is the opposite. However, whether they have been stolen or not, they make more money, so I list them as conservative recommendations<

March 12, 2010
QQ farm launched red soil land for high-level users to upgrade. After viewing the information of high-grade crops, it is really very profitable, and
it can still get higher profits after being stolen, unlike lemon and bayberry before. Therefore, it is strongly
recommended that high-level friends upgrade the red soil and start planting high-grade crops.

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