The first grade elementary school mathematics volume 1 unit 1 knowledge points: mathematical addition and subtraction
When solving problems by looking at pictures, we should use the known conditions in the pictures to formulate correctly.
Commonly used relationships are:
(1) number of parts+number of other parts = total.
(2) Total number of parts = number of other parts
(3) Large number-decimal number = who is more than who, or who is less than who.
Find the addition of large numbers. Subtraction of decimal or phase difference sequence.
(4) Original-Borrow = How much is left, and how much is left by column subtraction.
3. When solving application problems, it should be formulated correctly according to the known conditions.
(1) Total score relationship (addition and subtraction)
Number of Parts+Number of Other Parts = Total-Number of Parts = Number of Other Parts
(1) when "a * * *, * *, full-length, original, etc." Appears in the question to indicate the total, the column is added.
(2) Column subtraction when there is "surplus, surplus, surplus, first time, second time, used up, finished eating, etc.". In question.
(2) Size relation (addition and subtraction)
Large Number-Decimal Number = Difference Number
Large number-Difference = Decimal number
Decimal+difference = large number
The number after the word "more" or "less" is the difference.
② The numbers on the left and right sides of the word "Bi" are large numbers and decimals respectively.
Find the addition of large series and the subtraction of decimal or difference series.
Knowledge points of mathematics in the first grade of primary school
Understanding of numbers
1, correctly and skillfully count the number of objects within 20.
2, will distinguish between a few and a few, grasp the order and size of the number.
3. Master the composition of numbers within 10, and read and write numbers from 0 to 20 correctly.
4. Be able to name single digits and ten digits, identify the meaning of the digits on each digit, and get a preliminary understanding of decimal.
5. Understand the meaning of the symbol "=" ">" "<, and use these symbols to represent the size of numbers.
digital arithmetic
1, initially know the meaning of addition and subtraction in the addition and subtraction formula and the names of each part, and initially know the relationship between addition and subtraction.
2. Skillfully calculate (orally calculate) the addition of one digit and the subtraction within 10.
3. Clever calculation (oral calculation) carry addition within 20.
4. Learn to solve some simple practical problems according to the meaning and algorithm of addition and subtraction.
Ordinary quantity
1, a preliminary understanding of clocks, you will know the hour and the half-hour time.
2. Cultivate students to initially establish the concept of time and form a good habit of cherishing and observing time from an early age.
Learning methods of mathematics in grade one.
First of all, listen to the teacher carefully. This is the main reason why I got good grades. Listen attentively, follow the teacher's thinking, don't be distracted, and don't listen at the same time. Secondly, we should pay attention to every word the teacher says, because mathematics is famous for its rigor, and there are serious differences between words, and there are infinite mysteries hidden between words. Pay attention to taking notes when listening to the lecture. Once the teacher talked about a difficult geometry problem, which I didn't understand at the moment. Fortunately, I wrote down the problem and the solution, thought it over carefully when I got home, and finally understood it thoroughly, so that I easily solved a similar problem in a competition and got a valuable score of 10. Raise your hand to speak actively in class. The benefits of raising your hand are really many! (1) can consolidate the knowledge learned in class. (2) Exercise your eloquence. Those vague ideas and mistakes can be taught by teachers. It's killing three birds with one stone. In short, listening should be done with hands, mouth, eyes, ears and heart.
Second, extracurricular exercises. Confucius said, "Learn from time to time". Homework after class is also an important part of learning and consolidating mathematics. I pay great attention to the accuracy and speed of solving problems. Accuracy means accuracy, concentrate on completing your homework independently, strive to be accurate once, and correct any mistakes in time. And speed is to exercise your concentration and sense of urgency. I often do this. I set the alarm clock at the beginning of my homework and put it out of sight, which helps to improve the speed of my homework. I won't be nervous during the exam, and I won't lose sight of one thing.
Third, review and preview. For the review of mathematics, I intend to preview it every night. After finishing my homework that day, I will briefly look at the new knowledge I will learn the next day, and then recall what the teacher said. When I sleep in bed, I will "watch" the teacher's class in my mind like watching a movie. If there is any problem, I will get up and look at it immediately until I understand it. Every Sunday, I will also summarize, review and preview the week's homework. This is good for learning mathematics, and you won't forget it if you master it firmly.
Fourth, improve. After finishing my homework, previewing and reviewing, I will do some rock climbing problems. Doing this kind of problem, thinking independently as much as possible and trying to find out the hidden conditions are the key to solving the problem. If you really can't think of it, you need to look at the reference books and consult your teachers and classmates. In short, seeing more, doing more, asking more questions, being open-minded, diligent and keeping a positive spirit are the key.
Summarize the relevant articles on the knowledge points of mathematics in the first grade of primary school;
★ The arrangement of mathematics knowledge points in the first grade of primary school
★ Summary of primary school mathematics knowledge points
★ Summary of mathematics learning methods and knowledge points in the first grade of primary school
★ Summary of compulsory knowledge points in first grade mathematics.
★ Guidance of mathematics learning methods in the first grade of primary school
★ Organize the knowledge points of mathematics in the first grade of primary school.
★ induction of mathematics test sites in the first grade of primary school
★ Sort out the knowledge points of first-grade mathematics.
★ Summary of difficulties and learning methods of mathematics knowledge points in senior one.
★ Key summary of primary school students' mathematical knowledge points