Milk power

9. It is one of the important tasks of primary school mathematics teaching to cultivate students' computing ability. As the addition and subtraction method within 20 is the focus of the first volume of primary school mathematics textbook and the basis of multi digit calculation, it is necessary to strengthen the cultivation of students' calculation ability from the first semester of grade one. How to improve the calculation ability of the first grade students? I think we should do the following: first, pay attention to the students' hands-on operation of learning tools, obtain the concept of number, and understand the calculation method. Number recognition is the premise of calculation. Conversely, calculation can deepen the understanding of the concept of logarithm. The two are organically connected through the composition and decomposition of numbers. In order to make students acquire the correct number concept and calculation method, it is important to cultivate students' calculation ability. At the beginning of this semester, I paid special attention to the students' hands-on operation of learning tools to obtain the concept of number and understand the calculation method. In the understanding part of teaching numbers within 10, after knowing each number, we make students understand the composition and decomposition of numbers through pictures or physical pictures, and then let students consolidate the composition and decomposition of numbers through repeated hands-on operation, and pay attention to the close combination of students' hands-on, thinking and language in the operation process, so as to cultivate their attention, observation, hands-on ability The ability of mathematical language expression and logical thinking. In the teaching of carry addition within 20, I did not rush to reveal the calculation method, but spent more time to let students carry out the "circle ten" operation, so that students can understand the "gather ten method" from the operation. By doing so, all the students in our class have a good grasp of the "ten methods" and laid a good foundation for learning the abdication subtraction within 20. 2、 From the reality of life leads to the teaching of calculation, understanding the theory is the key to improve the ability of calculation. If you want to be able to calculate quickly and well, it is the key of teaching to understand calculation theory. The understanding of arithmetic mainly depends on arousing students' awareness of how to calculate, how to calculate and how to calculate. How to achieve this effect? That is to introce from the reality of life, so that students can explore reasonable calculation in solving practical problems in life. For example, when teaching the carry addition of 9 plus several, you can set the situation, stimulate interest, and let students take the initiative to explore and discover. First of all, the situation is set in the introction link. The rabbit wants to treat. It prepares two boxes of milk for its good friends. There are nine bottles of milk in the first box and eight bottles of milk in the second box. How many bottles of milk has the rabbit prepared? Children, can you help the rabbit to calculate? Through the introction of small animals that students like to see and hear, the students will feel very interesting. They are willing to help the little rabbit calculate, and their interest will be aroused. After the students thought about it for a while, the teacher asked another question: do you have any way to let others see how many bottles of milk there are at a glance? At this time, the students will think deeply about what to do, so the method of making up ten is naturally found by the students. One bottle is taken from the second box and put in the first one. The first box makes up ten, and the remaining seven bottles in the second box are 17 bottles; Or take out two bottles from the first box and put them in the second box. The second box makes up ten, and the remaining seven bottles in the first box are 17 bottles. Students from the hands-on operation, quickly and intuitively understand the principle of the method, then the teacher to sum up, students will form a representation in the mind, and then on the basis of understanding the theory, learn to calculate 9 plus several carry addition. What's more beneficial to understand arithmetic is that students can draw inferences from one instance and transfer knowledge when calculating the carry addition of 8 plus several, 7 plus several and 6 plus several. In addition, once students encounter problems in the calculation, they can also calculate the problems according to the calculation theory. Therefore, in mathematics teaching, setting up the reality of life and making students understand the calculation theory in solving practical problems are the basis of improving students' calculation ability. Third, choose the form of practice from reality to improve the efficiency of classroom practice. After guiding students to form the concept of number and understand the calculation method on the basis of perceptual materials, they must graally form skilled calculation ability through timely and sufficient practice. In order to improve the efficiency of classroom practice without increasing the burden on students, I am very interested in choosing the form of practice, so that every student can have more opportunities to practice in class, At the same time, it is convenient for teachers to check in time. Also uses the collective to see calculates, listens to calculates, between the schoolmate gives the question to each other to calculate, the student everybody uses the brain to start. We also ask the students to find out the corresponding number cards according to some formulas shown on the blackboard, and then ask the students who are right and fast to paste the number cards on the corresponding formulas. This form of practice is very popular with students. 4、 The practice should be targeted and help students find the rules in the calculation. Although more practice is a way to improve the ability of calculation, but blindly focusing on quantity will only damage students' interest in calculation, and finally get the opposite effect. Therefore, the practice must be targeted, for those easy to make mistakes, easy to mix the topic of practice, so that students can really improve their computing ability in discrimination. The pertinence mentioned here can be aimed at the key points and difficulties in the textbook, can also be the mistakes often made by the students in this class, can also be some calculation problems of different types of questions, such as writing the number directly; See who is right and fast; Fill in the circle with the greater than sign, less than sign or equal sign; Fill in the appropriate number in the box... In different types of questions, students can not only improve their calculation ability, but also make them master the knowledge flexibly. Many calculation problems have their own rules to follow. If students master these rules, they can not only improve the accuracy and speed of calculation, but also cultivate their logical thinking ability and inctive reasoning ability. For example: the teacher can show some questions: 3-3, 8-8, 6-6, 10-10, 13-13, 16-16, 2-0, 5-0, 9-0, 0 + 4, 5 + 0, 17 + 0,... Let the students calculate first and then think. Can you classify these questions? How to divide? What's your reason? What rules do you find in the process of classification? Students in this series of activities and thinking, students can find the same two numbers subtraction must get 0, a number and 0 add also get this number, a number minus 0 also get this number... These laws. 5、 To improve students' computing ability, we must first cultivate students' good computing habits. Many teachers often find that students make a lot of mistakes when doing calculation problems in teaching, and these errors are not that students can't calculate, nor that students don't know how to calculate, but because of bad calculation habits. This performance is: the wrong number, read the wrong symbol and so on. Therefore, it is particularly important to cultivate students' good calculation habits. First of all, it is necessary to cultivate students' good writing habits. Students are required to write Arabic numerals and operational symbols carefully. Only when they write correctly is the premise of correct calculation. Secondly, we should form the habit of careful examination, that is, we should see the requirements of the questions clearly, and solve the problems on the basis of correct understanding of the meaning of the questions, so as to avoid the phenomenon of wrong answers. Here, we should also pay attention to reminding students to see the operation symbols and numbers clearly when doing the questions, so as to avoid the phenomenon of wrong calculations because of reading the wrong questions. Finally, we should cultivate students' good habit of inspection. We should not just talk about the habit of inspection. We should teach students the method of inspection. Only when we can check, we can check. No matter what kind of good calculation habits are not achieved overnight, only in the teacher's strict requirements of repeated training, perseverance, good learning habits can graally form. The calculation ability of lower grade students depends on Teachers' careful design, careful guidance, various forms of practice and good habits to improve and develop, and to meet the requirements of the new curriculum standard.

10. Condition analysis: memory loss is called mild cognitive impairment in medicine. Psychological pressure is high, and in the long run, it will lead to the weakening of cerebral cortex function and memory impairment.
suggestions: some brain strengthening foods are actually common and inexpensive, such as egg yolk, soybean, lean meat, milk, fish, animal viscera (heart, brain, liver, kidney) and carrots, Cereals, etc