Seek key review materials for elementary and junior high school promotions.

First, the problem of difference and difference:

1. Scope of application:

The relationship between the sum, difference and multiple of two numbers is known.

2. Formula: (Sum Difference) 2 = Smaller Number, Smaller Number Difference = Larger Number, Sum Smaller Number = Larger Number, (Sum Difference) 2 = Larger Number, Larger Number Difference = Smaller Number.

Second, the three basic characteristics of the age problem:

1. The age difference between two people is constant.

2. The age of two people increases or decreases at the same time.

3. The multiple of two people's ages changes.

3. Tree planting issues:

1. Basic type: planting trees on straight lines or unclosed curves, planting trees at both ends Planting trees on straight lines or unclosed curves, and not planting trees at both ends. Trees are planted in straight lines or unclosed curves, with only one end of the tree.

2. The basic formula: number of trees = number of sections 1, number of trees distance section = total length, number of trees = number of sections 1, number of trees distance section = total length.

Fourth, the problem of chickens and rabbits in the same cage.

1. Basic concept: The chickens and rabbits in the same cage problem is also known as the replacement problem and the hypothesis problem, which is to replace the part that is wrong with the assumption.

2. The basic formula: assume that all chickens are rabbits: the number of chickens (the number of rabbit feet, the total number of heads, the total number of feet) (the number of rabbit feet, the number of chicken feet). Assume that all rabbits are chickens: rabbit number (total number of feet, number of chicken feet, total number of heads) (number of rabbit feet, number of chicken feet).

Fifth, the question of profit and loss:

1. Basic concept: a certain amount of objects, grouped according to a certain standard, produces a result: grouped according to another standard, and produces a result, due to the different standards of grouping, resulting in the difference of results, the number of groups of objects grouped or the total amount of objects grouped by their relationship.

2. The basic idea: first compare the two distribution schemes, analyze the changes in the results caused by the difference in standards, find the total number of shares participating in the distribution according to this relationship, and then find the total number of objects according to the topic.

Sixth, the cycle cycle and the number table law.

1. Periodic phenomenon: In the process of movement and change, certain characteristics appear regularly and cyclically.

2. Period: We call the time elapsed by two consecutive occurrences cycle.

Common Unit Conversions.

1. Conversion of length units: 1 km = 1000 meters, 1 meter = 10 decimeters, 1 decimeter = 10 centimeters, 1 meter = 100 centimeters, 1 centimeter = 10 millimeters.

2. Area unit conversion: 1 square kilometer = 100 hectares 1 hectare = 10,000 square meters 1 square meter = 100 square decimeters 1 square decimeter = 100 square centimeters 1 square centimeter = 100 square millimeters 3, volume (volume) unit conversion: 1 cubic meter = 1000 cubic decimeters 1 cubic decimeter = 1000 cubic centimeters 1 cubic decimeter = 1 liter 1 cubic centimeter = 1 milliliter 1 cubic meter = 1000 liters.

4. Weight unit conversion: 1 ton = 1000 kg 1 kg = 1000 grams 1 kg = 1 kg.

5. RMB unit conversion: 1 yuan = 10 jiao 1 jiao = 10 points 1 yuan = 100 points 6, time unit conversion: 1 century = 100 years 1 year = December month (31 days) have:

1 3 5 7 8 10 December (30 days) are: 4 6 9 November 28 days in a common year, 29 days in a leap year, 365 days in a normal year, 366 days in a leap year 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds 1 hour = 3600 seconds.

Equations of quantity relations are commonly used.

1. Number of copies: number of copies per copy total number of copies of each copy 2, multiple: 1 multiple of multiples of 1 multiple of multiples of multiples of multiples of multiples of 1 multiple 3, distance:

Speed Time Distance Speed Time Distance Speed Time Distance Time Speed 4, Price Volume: Unit Price Quantity Total Price Total Price Unit Price Total Price Quantity Total Price Unit Price Unit Price 5, Workload: Work Efficiency Working Time Total Work Total Work Efficiency Working Time Total Working Time Total Working Time Work Efficiency 6, Data Computing:

Addition and and one addition and the other addition.

Subtracted Subtraction Difference Subtracted Difference Subtracted Difference Subtracted Reduced Divisor Quotient 323 A number If two numbers are coprime when writing cyclic decimals, 5(3) The reciprocalization of numbers is in division 4First pass score ((Key to solving the problem:

The key points of knowledge for elementary school include Chinese knowledge, mathematics knowledge, and English knowledge.

1. Key points of language knowledge.

For the analysis of words, the words that need to be mastered include, homophones, synonyms, antonyms, idioms, colloquialisms, etc. Basic sentence patterns and grammar, including simple sentences, parallel sentences, compound sentences, special interrogative sentences, etc. Reading comprehension requires the ability to read texts of various genres and understand the general idea, structure, and intention of the text.

2. Key points of mathematical knowledge.

The concept of number requires mastery of natural numbers, integers, rational numbers, real numbers, and other concepts. Quantitative relations, you need to master addition, subtraction, multiplication, division and other operations, and be able to solve some basic proportion and fraction calculation problems. Geometric and three-dimensional figures.

It is necessary to grasp the name, properties and applications of various geometric shapes, as well as the definition and characteristics of 3D shapes.

3. English knowledge should be round and wide.

Vocabulary and grammar require mastery of basic English vocabulary, various tenses and usages of English verbs, and basic grammatical knowledge. Reading and listening. You need to read all kinds of short articles, stories, news and other English articles, and be able to understand the general idea and details of the articles.

Aspects to pay attention to at the beginning of the small promotion:

1. Do a good job of preparation in advance.

First of all, students need to prepare in advance. The content of the test is mainly based on the curriculum content of junior high school, so students need to understand the learning content of junior high school in advance and prepare for the pairing of needles and wide acres. They can focus on the knowledge points of junior high school and do some mock test questions so that they can familiarize themselves with the format and question types of the test.

1. Plan your time reasonably.

Students need to plan their study time reasonably. During the preparation period, students should arrange their study and rest time reasonably. They should make a detailed study plan and allocate their daily study time to different subjects and knowledge points.

At the same time, they should also set aside appropriate time for rest and relaxation to maintain a good mental state.

2. Do more exercises.

Students need to practice well. Doing questions is the key to improving your learning ability and test scores. Students can consolidate their knowledge and improve their problem-solving skills by doing a large number of exercises. You can choose some tutorial books, exercise sets or exercises on the ** learning platform to practice.

The revision is mainly to follow the teacher's rhythm. For the points where you have lost points, which knowledge points are not well mastered, it is good to have a targeted review.

Hope, thank you.