Combining the second-grade mathematics knowledge points of the People's Education Press

Knowledge is a treasure house, and practice is the key to unlocking the treasure house. Learning any subject requires not only a lot of memory, but also a lot of practice to consolidate knowledge. Below are some knowledge points for second grade mathematics that I have compiled for you. I hope it will be helpful to you.

Mathematics knowledge points from the first volume of the second grade of primary school

1. Addition without carry

(1) In specific situations, further understand the meaning of addition.

(2) Explore and master the calculation method of adding two digits to two digits (without carrying).

(3) Let students feel the connection between addition calculation and daily life, and further improve their problem-solving ability.

2. Carry addition

(1) In specific situations, further understand the meaning of addition.

(2) Explore and master the calculation method of two-digit addition and two-digit carry addition, and be able to perform calculations correctly.

(3) Be able to use two-digit addition to solve simple practical problems, further improving problem-solving abilities.

3. Subtraction without abdication

(1) In specific situations, further understand the meaning of subtraction.

(2) Explore and master the calculation method of subtracting two digits from two digits (without abdication).

(3) Further cultivate the awareness and ability to ask and solve problems.

4. Abdication and subtraction

(1) In specific situations, further understand the meaning of subtraction.

(2) Explore and master the calculation method of two-digit subtraction and two-digit subtraction, and be able to perform calculations correctly.

(3) Be able to use two-digit subtraction to solve simple practical problems, further improving problem-solving abilities.

5. Application of "how many more" and "how many less"

(1) In specific situations, understand the practical problem of "how many more or less than a certain number".

(2) You can use the operation of learning tools to let students figure out which quantity they are comparing with, what changes have occurred, and finally record it with calculation formulas.

(3) Be able to correctly formulate solutions to corresponding practical problems.

(4) Infiltrate statistical ideas and methods.

6. Continuous addition and continuous subtraction

(1) Explore and master the calculation methods of continuous addition and subtraction within 100, and further experience the diversification of algorithms.

(2) Be able to use continuous addition and subtraction operations within 100 to solve practical problems in life, and experience the diversity of problem-solving strategies.

7. Mixed addition and subtraction

(1) Explore and master the method of mixed addition and subtraction within 100, and be able to calculate proficiently.

(2) Improve awareness and ability to solve simple practical problems.

8. Estimation of addition and subtraction

(1) Understand the practical significance of addition and subtraction estimation in specific situations.

(2) Preliminarily master the estimation method of addition and subtraction within 100, and be able to estimate correctly.

(3) Develop estimation awareness and improve estimation ability.

Practical activities: I have grown taller

(1) Consolidate knowledge and skills related to length units and addition and subtraction. (Estimation, measurement, calculation)

(2) Let students experience the fun and value of mathematics and improve their estimation ability and hands-on ability.

(3) Infiltrate statistical knowledge and feel the joy of growth.

Knowledge points on division within tables in second grade mathematics

Knowledge points

1. Average score

1. The meaning of average score: Some items are divided into several parts, and each part gets the same amount, which is called equal sharing.

2. Method of dividing equally:

(1) When dividing some items equally into designated portions, you can divide them one by one or several pieces. Divide until all is divided.

(2) Divide some items equally into several portions. When dividing, you can think: this number can be divided into several such portions.

2. Division

1. The meaning of division formula: As long as it is the process of averaging, it can be expressed by division formula.

2. How to read division formulas: Usually read from front to back. "÷" is read as division, "=" is read as equal, and other readings remain unchanged.

3. The names of each part of the division formula: In the division formula, the number before the division sign is the dividend, the number after the division sign is called the divisor, and the resulting number is called the quotient.

3. Use the multiplication formula of 2 to 6 to find the quotient

1. Method of finding the quotient:

(1) Use the average score method to find the quotient.

(2) Use multiplication equations to find the quotient.

(3) Use multiplication formulas to find quotients.

2. When using the multiplication formula to find the quotient, think about the divisor and the dividend of the multiplication.

4. Solve the problem

1. Method to solve the problem of average score:

Total number ÷ number of copies = number of copies, total number ÷ number of copies = number of copies Dividend, dividend = quotient × divisor,

Dividend = quotient × divisor remainder, divisor = dividend ÷ quotient, factor × factor = product,

One factor = product ÷ another factor

2. A two-step calculation method of multiplication and division to solve practical problems:

(1) The problem required is to find the total number and use multiplication to calculate;

(2) The question asked requires finding the number of copies or the number of copies and calculating by division.

Knowledge Points of "Average Score" in Second Grade Mathematics

1. The meaning of average score: Divide some items into several parts, and each part gets the same amount, which is called average score.

2. Method of dividing equally:

(1) When dividing some items equally into designated portions, you can divide them one by one or several pieces. Divide until all is divided.

(2) Divide some items equally into several portions. When dividing, you can think: this number can be divided into several such portions.

Teaching process:

(1) Create situations and feel the "average score"

(1) Today the teacher brought you some small gifts. The teacher wants to give it to you. Please hand out the candies to every student in the group and ask them to finish the candies. (The number of candies in each group is different)

(2) Each group performs hands-on operations

(3) Each group reports the situation and the teacher writes on the blackboard.

(2) Observation questions

(1) Ask the children to observe the results of each small component. What did you find?

(2) Student observation report.

(3) From observation, we found that some components have the same number. Can you give this division a suitable name?

(4) Students choose their own names. .

(3) Present the topic

(1) The names given by the children are all very good. In mathematics, we call the equal number of points in each portion called the average score.

Write on the blackboard: average score

(2) Let the children talk about which groups just had average scores and which groups did not.

(3) What can you do to make the group that did not score evenly just now?

(4) Student communication and reporting

(Design Intention) : Allow students to discover the average score independently in the context of distributing candies. Respect students' learning autonomy and creativity. Teachers guide students to think positively and help students understand average scores through extension of questions.

★ A summary of the knowledge points of mathematics for the second grade of primary school

★ Key knowledge points of mathematics for the second grade of PEP

★ Basic knowledge points of mathematics for the second grade

★ Knowledge points from the second volume of mathematics published by the People's Education Press

★ Compilation of key knowledge from the first volume of mathematics for the second grade of primary school

★ Knowledge points from the second-grade mathematics published by the People's Education Press

★ Compilation of knowledge points of mathematics for the second grade of primary school

★ Knowledge points of the first volume of mathematics for the second grade of the People’s Education Press