Summary of second-year mathematics knowledge points
A preliminary understanding of 1 and multiplication
(1) Combined with the specific counting and swinging activities, I experienced the abstract process of adding with addend, felt the connection between this operation and daily life, and realized the necessity of learning multiplication.
(2) Combined with the specific situation, I experienced the process of abstracting the continuous addition formula with the same addend into multiplication formula, and realized the significance of multiplication operation and the relationship and difference between multiplication and addition.
(3) I can rewrite a serial addition formula with the same addend into a multiplication formula, write and read, and calculate the result of a simple multiplication formula by addition.
2. A preliminary understanding of multiplication
(1) can list the multiplication formula according to the addition formula, and know the names and meanings of each part in the multiplication formula.
(2) Knowing that it is very simple to express "the same addend addition formula" by multiplication formula lays a foundation for further learning multiplication.
(3) Can find and put forward problems that can be solved by multiplication from life situations, and initially learn to solve simple multiplication problems.
Multiplication formula of 3 and 5
(1) Combined with the specific situation, I further realized the significance of multiplication, and experienced the calculation process of the multiplication formula of 5 and the compilation process of the multiplication formula of 5.
(2) You can use the multiplication formula of 5 for multiplication calculation and experience the benefits of using the multiplication formula.
(3) Simple practical problems in life can be solved by multiplication of 5.
4. (2, 3, 4) Multiplication Formula
(1) Based on the specific situation, I went through the process of writing multiplication formulas of 2, 3 and 4, and further realized the method of writing multiplication formulas.
(2) We can find the arrangement rules of each group of multiplication formulas, cultivate the habit of orderly thinking and gradually develop the sense of numbers.
(3) If you master the multiplication formula of 2, 3 and 4, you can use the formula you have learned to perform multiplication and solve simple practical problems.
Summary of important knowledge points of mathematics in the second grade of primary school
First, hybrid computing
Mixed operation, multiply first, then divide, then add and subtract. If there are brackets, count them first. Only addition, subtraction, multiplication and division should be calculated from left to right.
Second, solve the practical problems of two-step calculation.
1, think about what problems to solve first, and then what problems to solve.
2, you can draw pictures to help analyze.
3. It can be distributed computing or integrated computing.
Unit of length: the unit of length refers to the basic unit for measuring spatial distance, which is formulated by human beings to standardize the length.
Its international unit is "meter" (m), and commonly used units are millimeter (mm), centimeter (cm), decimeter (dm), kilometer (km) and so on. Length units play an important role in various fields.
Meter: The standard unit of length in the international system of units is "meter", which is represented by the symbol "m".
Decimeter: dm is one of the metric units of length, and 1 decimeter is equivalent to one tenth of 1 meter.
Centimeter: unit of length, abbreviated as centimeter.
Millimeter: English abbreviation for mm
(1 cm = 10/0mm =0. 1 decimeter =0.0 1 m =0.0000 1 km)
Guidance of learning methods in the second grade of mathematics
Guidance method 1
First, pay attention to calculation: everyone knows that calculation is the basis of learning mathematics well, and good calculation can bring great help to children.
The calculation of the second day of junior high school is simple and the calculation requirements are low, which leads to the great difference between the current children's calculation and the previous children's calculation.
Third, parents can let their children do oral calculations for 2 minutes every day. At first, only 20 crossings can be completed in 2 minutes, but after that, the children will be faster and faster, and the correct rate will be higher and higher. If you don't lay a good foundation for calculation in the lower grades, decimals, fractions and equations will come after the fourth and fifth grades. At this time, I feel that mathematics is more difficult to learn!
Fourth, properly study the Olympic Mathematics: Many so-called Olympic Mathematics problems are not difficult, but the methods are ingenious. It needs you to look at the problem from another angle, jump out of the wall of thinking and help children enrich their knowledge.
Guiding method 2
First, grasp the time. This semester, they will be exposed to the second hand and learn the time more accurately on the basis of the second grade. Very short time is expressed in seconds. At this time, the child's conversion unit is the key point. Many children don't pay attention to the unit and are prone to mistakes.
Second, the calculation of time period. After defining the conversion of time units, we should pay attention to the calculation of time periods, which is also a common question type and equally important. At this time, children can easily solve this problem as long as they master the 24-hour timing method.
Third, multiple problems. The multiple problem is a difficult point, and many students will be at a loss if they can't find the relationship, so this time they use it as a diagram to solve it, so it is clear. Therefore, it is very important to teach children to draw and clarify the relationship between numbers.
Addition and subtraction of four or three digits. On the basis of two-digit addition and subtraction, it is not too difficult for children to master three-digit addition and subtraction. Just pay attention to the child's handwriting when standing vertically. Numbers should be aligned, starting from units, and must be marked with carry and abdication symbols. Many children easily forget that they are married and give up.
Guiding method 3
1. Before each class begins, there must be a brief introduction. There is an introduction that is a complete and good lesson. Note: there are several general import parts to stimulate interest; Intuitive import, directly into the theme; The scene introduction is memorable. A few minutes' introduction is not very long, but it can make students get into the theme of this lesson quickly, from the inner noise to listening carefully.
When students don't understand something, teachers should pay attention to it in time. After class, we should actively prepare lessons and carry out review classes for teaching. Or insert a role game in peacetime to facilitate students to strengthen their understanding of the concepts they have learned.
3. Junior students should pay attention to detailed explanations and accurate demonstrations, focusing on rich pictures. Note: Teachers' teaching should be intuitive. Teachers should try to make some complex concepts easy to understand, and use more pictures and videos (teaching AIDS) to fully attract students' interest and attention.
4. Senior three students often pay attention to the explanation of knowledge points many times when solving problems, and often senior three students need to use formulas to set the volume and area of unknowns, cylinders, cones, or speed problems when solving problems.
Articles related to the knowledge points of mathematics in the second grade of Shanghai Education Press;
★ Shanghai Education Edition Grade Two Chinese Knowledge Points
★ Guidance on learning methods in the second grade of primary school
★ Second grade English knowledge points Shanghai Education Edition
★ Best learning method recommendation
★ Review method
★ Learning skills of primary school students
★ Shanghai Education Edition Grade Three Mathematics Volume I Review Outline
★ Guidance of eighth grade learning methods
★ Summary of learning methods in primary and secondary schools