Knowledge points of mathematics in the second grade of primary school
1, division of knowledge points in the table:
(1) Understand the meaning of average score. A simple division is calculated according to the multiplication in the table.
(2) The quotient can be obtained by multiplication formula.
(3) According to the meaning of multiplication and division, solve some simple application problems of multiplication and division.
(4) Divider Divider = quotient divisor = divisor × quotient = dividend
2. Division: It is one of the four operations. The operation of finding the other factor by knowing the product of two factors and one of them is called division.
3. The nature of division
A number divided by several numbers in succession is equal to the product of this number divided by those numbers. This is the nature of division. Sometimes simple operations can be performed according to the nature of the division. Such as: 300÷25÷4=300÷(25×4)
4. Division formula
(1) frequency divider = quotient
(2) Dividend quotient = divisor
(3) divisor × quotient = dividend
5. Dividends
A number divided by another number in a division operation, such as 24÷8=3, where 24 is the dividend.
Knowledge points of quadrilateral understanding in senior two mathematics
Rectangular and square
Knowledge points:
1, master the characteristics of rectangular squares: both rectangles and squares have four sides, four right angles, the opposite sides of the rectangle are equal, and the four sides of the square are equal.
2. Understand the relationship between rectangle and square: square is a special rectangle.
3. Can draw rectangles and squares on grid paper.
parallelogram
Knowledge points:
1, intuitively understand the parallelogram, and know that the parallelogram has four sides, four corners, and the opposite sides are equal.
2. Understand that a rectangle is a special parallelogram.
Explore new knowledge.
1, teaching example 1. (Know quadrilateral)
(1) In the picture below, if you think it is a quadrilateral, cut it out. (Printed, one copy per person)
Students report after cutting and give reasons.
(2) Group discussion.
What characteristics do you find in quadrangles?
Student report, the teacher writes on the blackboard according to the answers:
Four straight edges
Quadrilateral existence
crossroads
(3) Connecting with the reality of life, talk about which objects around you are quadrilateral surfaces.
2. Teaching example 2. (Classify quadrangles)
(1) classify the quadrilateral you cut. (Students operate independently)
(2) Are there any differences? (Group communication)
Students report and give reasons.
Mathematics learning methods and skills
1, calculated by:
For the students in Grade Two, the first problem is calculation, which is the key and difficult point. Judging from the learning situation of school mathematics, children have never learned the column vertical form of multiplication and division, especially the column vertical form of multiplication requires more in the learning of second grade mathematics. For example, multiplication is used many times in the third lecture of mathematics textbook, and it will also be used in other application problems.
2, enumeration difficulties:
For sophomores, orderly thinking and abstract thinking are more difficult. Sophomore students are more willing to try to answer questions by making up numbers. The problem of enumeration requires children to think in an orderly way. For example, the method of collecting money with several coins in the first book of mathematics textbooks and the integer splitting in the second book all belong to the problem of enumeration. This kind of question not only requires children to be organized, but also is not intuitive and difficult for children to understand. Parents are advised to visualize abstract questions.
3. Contact information for application questions:
Many parents of junior two students hope that their children can get good grades in the Renhua exam. Many parents have such questions. Do you want to learn the content of grade three, especially the application questions? First of all, the last few lectures in the second volume of the second grade mathematics textbook have already involved some concepts such as application problems and multiples. We suggest that children who have spare capacity for learning can properly contact some problems in the third grade, but the difficulty should not be as great as that in the math textbook of the third grade.
Related articles on knowledge point induction in the second volume of second grade mathematics;
★ Review of knowledge points in the second volume of second grade mathematics of Jiangsu Education Press.
★ Summary of second-grade mathematics knowledge points of Jiangsu Education Edition
★ The second volume of the second grade of Su Jiaoban reviewed the data mathematics.
★ Summary of knowledge points in the second volume of the second grade Chinese of Jiangsu Education Edition
★ Encyclopedia of Mathematics Learning Methods in Different Grades
★ Mid-term examination papers and answers in the second volume of second grade mathematics published by Jiangsu Education Publishing House.
★ Guidance of mathematics learning methods in the second grade of primary school
★ Review questions in the second volume of the second grade mathematics final exam (Jiangsu Education Edition)
★ Review materials for the second grade corner of Jiangsu Education Edition.
★ Guidance on learning methods in the second grade of primary school