Knowledge points of "average score" in senior two mathematics
1, the meaning of average score: divide some projects into several parts, and each part gets the same amount, which is called average score.
2, the average method:
(1) When some articles are divided equally according to the prescribed number of copies, they can be divided into one article or several times until all the articles are finished.
(2) Divide some items into several equal parts. Think about time-sharing: this number can be divided into several such parts.
(A) create a situation and feel the "average score"
(1) The teacher brought you some small gifts today. The teacher wants to give it to you. Please start distributing candy to every student in the group and ask for all the candy. (The number of sweets in each group is different. )
(2) Hands-on operation of each group
(3) Each group reports the situation and the teacher writes it on the blackboard.
(2) Observe the problem
(1) Please observe the results of each group. What did you find?
(2) student observation report.
(3) From the observation, we found that some components have the same amount. Can you give such a division a proper name?
(4) Students name themselves.
(3) Show the theme
(1) The children have good names. In mathematics, we call the same number of points in each part the average score.
Write on the blackboard: average score
(2) Let's talk about which groups are average scores and which groups are not.
(3) What can we do to make the groups that have not been averaged just now?
(4) Students exchange reports.
(Design intention): Let students find the average score independently in the situation of dividing candy. Respect students' learning autonomy and creativity. Teachers guide students to think positively and help students understand the average score through the extension of questions.
Knowledge points of mathematics division with remainder in the second grade of primary school
First, divide by the remainder.
1 has the meaning of remainder division: when some objects are divided equally, sometimes there will be a remainder.
2. Relationship between remainder and divisor: In division with remainder, remainder must be less than divisor. The remainder of is less than the divisor 1, and the smallest remainder is 1.
3. Calculation method of pen division:
(1) Write the division number "Factory" first.
(2) The dividend is written in the divisor, and the divisor is written to the left of the divisor.
(3) Trial quotient, written on the dividend, the dividend-oriented unit.
(4) Write the product of quotient and divisor under the dividend, and the same digits should be aligned.
(5) Divider minus the product of quotient and divisor. If there is no remainder, it means divisibility.
4. The calculation method of remainder division can be divided into four steps: one quotient, two squares, three subtractions and four ratios.
(1) Quotient: Trial Quotient. If you want to multiply the divisor by a few, the nearest dividend is less than the dividend, then the quotient is a few, written on the unit of dividend.
(2) Multiplication: multiply the divisor and quotient, and write the number below the dividend.
(3) Subtraction: Subtract the product of quotient and divisor from the dividend, and write the difference below the horizontal line.
(4) Ratio: Compared with the divisor, the remainder must be small.
Second, solve the problem.
According to the meaning of division, to solve the simple division problem with remainder, we should deal with the remainder flexibly according to the actual situation.
Mathematics learning methods and skills
1, the earlier mathematics is introduced, the easier it is.
Now mathematics is becoming more and more important in various selections and CET-6. Many parents want their children to learn some math. For students who want to choose a better school in the sixth grade of primary school in the future, our suggestion is that it is better to study early. First of all, learn mathematics early, and the knowledge system of mathematics is relatively complete, so there will be no need to cram the mathematics knowledge of grade three in grade six. Secondly, getting started early has enough time to stimulate children's interest in mathematics, and the difficulty of getting started is relatively low.
2. Interest is the most important, and the starting point is the key.
Many students in Grade 4 and Grade 5 want to start studying mathematics. Surprisingly, quite a few of these students did study mathematics in the lower grades, but gave up because of the poor learning effect in class at that time. In the senior year, due to the situation in the sixth grade, they had to study again. For such students, learning mathematics has a certain shadow, and even some students hold the idea that they are not suitable for learning mathematics and have certain resistance.
Therefore, since parents have decided to learn mathematics from the lower grades, they should first pay attention to the cultivation of interest and help their children find things that they are interested in mathematics, such as number games and so on.
At the same time, if you don't choose a good starting point, children will have a hard time learning and naturally will not be interested, so parents should also pay attention to the appropriate curriculum choice.
3. Good teachers and good habits
It is very important for second-year students to cultivate their interests and study habits. Therefore, finding a teacher that children like is the most important thing in learning. A good teacher can make children like classes quickly and infect students with their own personality charm. In class, teachers are not only teachers, but also friends of children. They discuss problems with their children and think together, so that children can develop good study habits and like math while enjoying their teachers.
Summary of knowledge points of Qingdao edition of senior two mathematics;
★ Guidance of mathematics learning methods in the second grade of primary school
★ Summary of Teachers' Work in the First Term of Grade Two
★ Qingdao Edition Grade Two Mathematics Volume I Final Examination Paper
★ Mathematics Teaching Plan for Senior Two
★ Summary of 5 teaching plans for Grade Two in Senior High School.
★ Analysis of Mathematics Examination Paper at the End of the First Volume of Senior Two.
★ Qingdao Edition Primary School Grade Two Volume 1 Mathematics Examination Paper
★ Qingdao Edition Grade Two Volume I Final Mathematics Examination Paper
★ Qingdao Edition Grade Two Mathematics Volume 2 Final Examination Paper