Senior one mathematics knowledge points
Front-back (front-back positional relationship)
1, pay attention to the difference between describing the order of objects and describing the exact position of objects with words like before and after.
2. The deer is in front, who is behind? The answer is no, not only a squirrel, but also rabbits, turtles and snails are behind the deer.
3. Pay attention to let students describe the relative position of objects with words like before and after.
Up and down (positional relationship between up and down)
1. Understand the relativity of "up and down" in specific situations.
2, can use language to express the "up and down" position relationship of objects in actual situations.
Left and right (positional relationship between left and right)
1, you can describe the left-right position relationship of an object in language.
2. Can experience the relativity of left and right positions in the situation. Further understanding: if two people face the same direction, they see the left and right positions in the same order; If they face each other, they see the left and right positions in the opposite order.
Classroom (front and back, up and down, left and right comprehensive application)
Describe the position and order of objects by using the knowledge learned in the first three lessons.
The knowledge point of "understanding numbers within 100" in senior one mathematics.
1, from the right, the first digit is one, the second digit is ten, and the third digit is one hundred.
Reading and writing methods: both reading and writing should start from the high position.
2. Singular number: a natural number with the unit of 1, 3,5,7,9.
3. Even numbers: natural numbers with units of 0, 2, 4, 6 and 8 (except 0).
4. Integer: a natural number with the unit of 0 (except 0).
Five tens and five ones make fifty-five. (Five decimal places means five tens, and five decimal places means five ones. )
Reading: 55 (writing Chinese characters) Writing: 55 (writing mathematical characters)
6, 10 one is ten, 10 ten is one hundred. (One, ten and hundred are counting units. Write Chinese characters)
Composition of numbers: (Pay attention to different ways of asking questions)
Example: 68 consists of six tens and eight ones; 68 consists of 8 1 and 6 10.
There are (6) tens and (8) ones, and (68) ones.
The decimal digit is 6, which means 6 tens (writing Chinese characters), and the unit digit is 8, which means 8 ones (writing Chinese characters).
7. The method of comparing the size of two digits: look at the ten digits first, and the bigger the number, the bigger it will be. If the ten digits are the same, if you look at one digit, it will be bigger. (The opening faces a large number and the tip faces a decimal number. )
8. When the difference between the two quantities is large, it can be described as "much more, much less"; When there is little difference between the two quantities, it can be described as "more, less".
9. The smallest three digits are100; The two digits of are 99; The smallest two digits are10; One digit of is 9; The smallest number is 1.
A good way to learn math easily in grade one.
1, column condition
Find an example in the textbook and list the known conditions and solutions of the example one by one;
Step 2 do the problem
Out of the question;
3, check
Check whether your answer is wrong;
4. Revision
Modify your own questions according to the answers to the questions;
Step 5 do the right thing
Get the topic right;
6. rhythm
Find out the rhythm of the problem, how many big steps?
7. Summary
What's the test on this topic?
8. Change
Modify the conditions or conclusions of knowledge points and re-issue the questions;
9. Solve the problem
Every change is a new topic, solve it;
10, sorting out
Sort out all the topic types of a knowledge point.
If you follow these ten steps to do a topic, the learning effect will be obviously improved.
Hunan Education Publishing House, Senior One Mathematics, Volume II, related articles on knowledge points;
★ Knowledge points of the second volume of mathematics in the first grade of primary school
★ Key summary at the end of the second volume of mathematics in the first grade of primary school.
★ Primary school first grade mathematics test center
★ Summary of compulsory knowledge points in first grade mathematics.
★ Make up the knowledge points of mathematics in the second volume of Grade One.
★ The arrangement of mathematics knowledge points in the first grade of primary school
★ Review knowledge points of senior one mathematics: number and algebra
★ Sort out the knowledge points of first-grade mathematics.
★ Knowledge points of mathematics in the first grade of primary school
★ Mistaken questions and review skills in the second volume of mathematics in the first grade of primary school