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Induction of Mathematics Knowledge Points in the First Three Days of Junior High School Examination in Xiao Sheng
Induction of Mathematics Knowledge Points in the First Three Days of Junior High School Examination in Xiao Sheng

The following is a summary of the methods and key points of each test center.

First, algebra simple test site

1, read and write large numbers

Say "reading" first: it can be divided into three readings and two readings.

Third reading: ① Reading at the beginning of each level: 80,800-reading "80,800"

② Zero between two non-zero numbers of the same level should be read. Example 8080- pronounced "8080"

(3) Ten thousand all zeros. For example: 800008000- pronounced "808 million"

Two don't read: ① Zero don't read at the end of each level: 808,000-read "808,000"

(2) All zeros at the end. For example: 80,000-pronounced "80,000"

Let's continue to look at "writing":

Two points should be paid attention to in writing: one is rounding; The second is "unit conversion"

If "approximate, approximate, accurate, reserved to" is mentioned in the title, rounding must be tested.

If "rewriting" is mentioned in the topic, you must take the exam. It's unit conversion.

2. Scale

The topic of scale is relatively simple, and the test center often lies in unit conversion.

3. Statistical chart

① Bar chart

② Fan-shaped statistical chart

The difficulty of the statistical chart in the 526 exam will not be too great, just make clear the meaning of various images in each statistical chart. I hope you can review your usual study materials in time.

Step 4 find a pattern

It is more flexible to find regular questions, so I won't give examples. But the essence can be divided into digital method and graphic method. No matter what the law is, it starts with simplicity and becomes numbers. ...

5. Common sense of life

In 526, I will certainly examine some common sense problems in my life, but these are closely related to the growth of my classmates, and there is no surprise. Just trust your own judgment.

Second, the geometry test center

1, plane geometry

(1) Number of line segments and total length.

Take a topic in the lecture notes of the punching class in the middle school attached to 526 University of Technology as an example:

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② Find the area

Common models:

Half a model, * * * height model, butterfly model, etc.

Basic method:

Addition, subtraction, segmentation, cutting, translation, difference invariance, etc.

The following are several typical examples in the lecture notes of punch card class of 526 University of Technology for your reference.

For more specific review questions, you need to refer to the examples and exercises you usually study.

③ Geometry and motion: the motion of points and figures.

2, solid geometry

Solid geometry can be divided into the following one or more test points:

① Find out the surface area

② Find the volume (specifically: equal volume transformation, segmentation and splicing, and accumulation).

③ Three Views

④ Folding and unfolding of cubes.

⑤ Shortest path problem (specifically divided into cuboid, cube and cylinder)

Third, the application problem.

1, fractional application problem

Main methods: volume ratio correspondence, transformation unit 1, and grasping invariants.

2, the application of economic profits.

Main methods: set number and column equation.

3. Classical application problems

Main types of questions: average, sum and difference times, chickens and rabbits in the same cage, profit and loss, age, tree planting, trip (it is unlikely to take the trip question)

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