Senior one mathematics knowledge points
Understanding of the number 1 1-20
1, number: according to the number of objects, it can be represented by 1 1-20.
2. Sequence: 1 1-20 The sequence is: 1 1, 12, 13, 14, 15,/kloc.
3. Comparison size: comparison can be made according to the order of numbers, and the last number is always greater than the previous number, or according to the composition of numbers.
4. Composition of the number 1 1-20: All of them are composed of 1 tens and several ones, and 20 is composed of two tens. Such as: 1 ten and five 15.
5. Number of digits: the first digit on the right is one digit, and the second digit is ten digits.
6. 1 1-20 How to read each number: read dozens of digits from high places and several digits. Pronunciation of 20, 20 is pronounced: 20.
7. Write numbers: When writing numbers, write by referring to them. If there are 1 tens, write 1 in the tenth place, and write 2 if there are two tens. If there are several ones, write a few on the single digit. If there is no unit on a digit, write 0 as a placeholder.
8. Ten plus several, ten plus several and the corresponding subtraction.
(1), 10 plus several and the corresponding subtraction calculation method: 10 plus several to get ten, ten minus several to get ten, and ten minus ten to get several.
For example,10+5 =1517-7 =10/8-10 = 8.
(2) Calculation method of addition and subtraction of more than ten digits: When calculating the addition and subtraction of more than ten digits, you can use the composition of numbers to calculate, or you can add or subtract the digits and then add the whole ten.
(3) Add and subtract the names of each part:
In the addition formula, the numbers before and after the plus sign are called addends, and the numbers after the equal sign are called sums.
In the subtraction formula, the number before the minus sign is called the minuend, the number after the minus sign is called the subtraction, and the number after the equal sign is called the difference.
9. Solve the problem
To find how many numbers are between two numbers, you can use counting method or graph method. You can also use the calculation method (subtract large numbers from 1).
Collection of first-grade mathematics knowledge points
What knowledge points?
When counting objects, we need to use the numbers 1, 2, 3, 4, 5, ... We call them natural numbers. Natural numbers have two meanings; When used to indicate how much something has, it is called cardinal number; When used to indicate the order of things, it is called ordinal number. Usually "a few" means cardinal number, so "which one" means the order of things, that is, where the objects are.
Correctly use "several" and "which several" to express meaning and understand the difference between cardinal number and ordinal number.
Personal practice and perception of numbers can not only indicate quantity, but also indicate the position of things. "What number" means position and "What number" means quantity.
Understand the relationship between "which number" and order, and use "which number" to represent numbers.
The key and difficult point of this chapter is to correctly express the meaning of "several" and "which one", understand the difference between cardinal number and ordinal number, and make clear the meaning of "several" and "which one".
Cultivate students' ability to analyze, think and solve problems, observe things and operate. So as to stimulate students' sense of numbers, have a strong interest in numbers, and achieve the purpose of loving learning mathematics.
The method of mathematics guidance in the first grade of primary school
First, pay attention to the lecture in class and review it in time after class.
The acceptance of new knowledge and the cultivation of mathematical ability are mainly carried out in the classroom, so we should pay special attention to the learning efficiency in the classroom and seek correct learning methods. In class, we should keep up with the teacher's thinking, actively expand our thinking to predict the next steps, and how Billy's own problem-solving thinking is different from what the teacher said. However, due to various reasons, there are often some students who can't keep up with the teacher's ideas and have loopholes in their studies. At this time, on-the-job teachers are needed to give one-on-one counseling to students. In the process of tutoring, the teacher will help students recall what they have learned in one day and guide them to correctly master the reasoning process of various formulas. In a sense, this will help students develop a learning style of asking questions when they don't understand.
In addition, teachers can help students to sort out and summarize one by one at each learning stage, and combine the points, lines and surfaces of knowledge into a knowledge network and bring it into their own knowledge system.
Second, do more questions appropriately and develop good problem-solving habits.
If you want to learn mathematics well, you should do more questions and be familiar with the problem-solving ideas of various questions. At the beginning, we should start with the basic questions, take the exercises in the textbook as the standard, practice repeatedly to lay a good foundation, and then find some extracurricular exercises to fund the development of questions.
How to cultivate children's language ability and how to cultivate children's language ability is also satisfactory. It is a calculation method that directly calculates numbers without using calculation tools, mainly relying on thinking and memory. The new syllabus points out that oral calculation is not only the basis of written calculation, estimation and simplification, but also an important part of calculation ability. It can be seen that to cultivate students' computing ability, we must first start with oral computing ability. So how to cultivate students' oral ability? My experience is that it is very important for teachers to read the three-character classics well: "foundation (grasping the foundation), teaching method (teaching method) and practicing method (routine training)" Reading the word "base" well means basic oral calculation. Oral calculation in primary school mathematics teaching can be divided into three categories: basic oral calculation, general oral calculation and special oral calculation. These three types of oral calculation are mainly based on the content of basic oral calculation, which is the basis of calculation. Basic oral calculation must require proficiency, and proficiency refers to "blurting out", while the other two types of oral calculation only require proficiency or learning. Therefore, we should pay attention to the following aspects:
1. Visual representation of oral calculation
From the form of operation, the oral calculation in the lower grades of primary school is a transition from intuitive perception to imagery operation. For example, establish the appearance of "9+2" in teaching: first show a box with 9 balls, and then prepare 2 balls for students to think. "It depends on a * * *, how many balls are there? How should I put them?" Soon a student said, "I took 1 ball out of the two balls outside the box and put it in the box." There are 10 balls in the box, and there is one outside, a * * *1/." I praised this classmate for speaking well, and explained that this method is called "Ten-complement method", that is, when you see nine, you think of nine, and how many supplements 10. In this way, the appearance is established, and the accuracy of oral calculation has a foundation.
2. Manage liquidation and help oral calculation.
The teaching of oral calculation is not to pursue the speed of oral calculation, but to let students understand the truth. Only by understanding the reasons can we effectively master the basic methods of oral calculation. Therefore, we should attach importance to the teaching of mathematical theory. For example, when teaching 8+5= 13, we should start with the actual operation and let students understand that 8 is less than 10. Add 8 and 5, divide 8+5 by 2 and 38+58 and 2 to form 1023 10 and add 3 to get 65438. 10 and draw a thought process diagram of 8+5= 13. On the basis of students' full understanding of arithmetic, simplify the thinking process and abstract the rules of carry addition: "Look at a large number, divide it into decimals, make it 10, and add a few more." Finally, guide students to think about how to calculate "5+8". In this way, students understand arithmetic and master the basic methods of oral calculation.
Summary of key knowledge points of senior one mathematics;
★ Summary of compulsory knowledge points in first grade mathematics.
★ The first volume of the first grade mathematics of People's Education Edition is finally arranged.
★ Sort out the knowledge points of first-grade mathematics.
★ Guidance of mathematics learning methods in the first grade of primary school
★ The key arrangement at the end of the first volume of the first grade mathematics.
★ The learning focus of first-grade mathematics
★ Summary of difficulties and learning methods of mathematics knowledge points in senior one.
★ Knowledge points of mathematics in the first grade of primary school
★ Learn the knowledge points of the first volume of mathematics in senior one.
★ Summary of mathematics learning methods and knowledge points in the first grade of primary school