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Smile formula mathematics
Chinese examination paper for the fourth grade of primary school

Respondents;

Students, it's another semester in a blink of an eye, and it's also our harvest season. Now, please open your wise mind and pick these harvested fruits. Remember: as long as you put your heart into it, you are the best! !

basic knowledge

First look at pinyin and write words.

Cosch ǔ n

(Stupid) (Sacrifice) (Stubborn) (Spoiled) (Leading)

This is a good example.

(Bat) (Liver) (Winding) (Tired) (Healthy)

Secondly, I will find several groups with similar meanings and write them in brackets accordingly.

I am puzzled by the difficulties I have always dreamed of and attached importance to.

Gift, thinking about it day and night, unhappy, confused and frowning.

(Gift)-(Gift) (Confused)-(Confused)

(moping)-(scowling)-(dreaming)-(thinking day and night)

(Difficulties)-(Shortage)-(Value)-(Value)

Complete the following idioms, choose at least two idioms you like and write a sentence or two to praise your hero.

Know (yourself) and know (others)

There are no enemies in this direction.

Sound (East) Trend (West)

Fourth, sentence kaleidoscope.

1. How can we stand idly by in the face of people in urgent need of help? (changed to declarative sentence)

Answer; We can't stand idly by in the face of people in urgent need of help.

2. Fireworks bloom. (Write sentences specifically)

Answer; Beautiful fireworks bloom like flowers.

2. The lake is calm. (changed into a figurative sentence)

Answer; The lake is as calm as a mirror.

4. The leaves clattered. (changed to anthropomorphic sentence)

Answer; The leaves are singing loudly in the Woods.

5. Ji Chang studies hard and practices hard. Ji Chang hit every shot and became a master archer. (Synthesize a sentence with appropriate related words)

Answer; Ji Chang finally became an archer by studying hard and practicing hard.

Reading problem

(1) _ Have something on Sunday _

On Sunday, my mother took me shopping. I specially took out the buckle flowers my aunt gave me on my birthday and put them on my chest. This button flower is really beautiful. The golden peacock-shaped buckle is inlaid with crystal stone. Move, and the "Golden Peacock" will glow, which is very pleasing.

There are more people in the shopping center on the street. My mother and I managed to squeeze into the counter. Just when I was attracted by colorful materials, my shoulder was pushed. I turned around angrily and shouted at the person who pushed me, "What are you squeezing?" Unexpectedly, instead of being annoyed, the man nodded to me with a smile, pointed at my chest and kept saying "Ah, ah ..." and motioned me out. I looked down "damn it! My button is gone! "

I pushed my way through the crowd impatiently. I saw that the man was about thirty years old, not tall and squinting. As soon as he saw me, he couldn't wait to deliver what he had in his hand. I took the belt buckle and took a closer look, huh? Isn't this the button flower I lost? I asked angrily, "Why do you take my buttons casually?" When the man saw that I was angry, he kept saying "Ah, ah ..." His face was full of anxiety. He pointed at the flowers in my hand for a while, then bent down and took a few steps, as if to tell me something. Judging from his expression and movements, I know that he is deaf and dumb. He picked up the button flower I pinched and gave it back to me, but I actually ...

"Fangfang, why are you standing in a daze?" Mother's voice interrupted my thoughts. I'm busy (looking around). Where are you? I haven't thanked him yet. He's gone.

My mother and I walked out of the shopping mall together, looking for that person while walking, hoping to see those eyes that were not very divine. What a respectable deaf-mute person! That noble quality deeply touched my heart. However, I didn't find him, only the buttons soaked in sweat in my hands sparkled in the sun and looked more beautiful.

1, add a topic to the composition.

2. Fill in the following words accurately in () of the text.

A sea of people. Look around, colorful.

He picked up my button flower and gave it back to me, but I actually ... "

① Supplementary ellipsis: But I yelled at him and didn't care about anything _ _ _ _ _ _ _ _ _ nothing.

② Ellipsis is used to indicate "I"; Very ashamed of _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Think about it. What would I say and do if I happened to meet a deaf-mute person later? Please write a paragraph.

Thank you, I don't know how to thank you,

I shouldn't have said anything about you that day,

Please forgive me.

Clever writing and exquisite description

Four years of school life, you must have experienced many things, some are happy, some are unhappy, some are wronged, and some are ... Choose one thing you want to tell others most, and write it down, so that the sentence will be smooth and clear. The topic is self-drawn. Pick me.

Summary of mathematics knowledge in primary schools-formulas of perimeter, area and volume of graphs and related knowledge.

★ Rectangular perimeter = (length+width) ×2

Rectangular area = length × width

★ Square perimeter = side length × 4

Square area = side length × side length

★ Triangle area = base × height ÷2

★ parallelogram area = base × height

★ Trapezoidal area = (upper bottom+lower bottom) × height ÷2

★ The circumference of a circle is equal to ∈× diameter or ∈× radius× 2, that is, C =∏d or c = 2 ∏ r.

★ The area of a circle is equal to the square of 3. 14× radius.

★ The area of the ring is equal to 3. 14× (the square of long radius-the square of short radius).

★ The circumference of a semicircle = half of the circumference+diameter, that is, ∏ R+2 R.

★ Surface area of cuboid = (length× width+length× height+width× height) × 2

★ cuboid volume = length × width × height or bottom area × height

★ Surface area of cube = side length × side length × 6

Volume of cube = side length × side length × side length

★ Surface area of cylinder =2 bottom areas+side area.

Transverse area = bottom circumference × height.

★ Cylinder volume = bottom area × height

Volume of cone = bottom area × height ÷ 3

★ Both cuboids and cubes have 6 faces, 8 vertices and 12 edges.

★ Three sides intersecting at the same vertex are called the length, width and height of a cuboid.

★ A cube can be regarded as a special cuboid.

★ At least 8 identical small cubes are needed to form a big cube.

★ The upper and lower bottom surfaces of the cylinder are circular with equal areas.

★ The edge of a cylinder is a rectangle, the length of which is the circumference of the bottom of the cylinder, and the height of which is the height of the cylinder.

★ The bottom surface of the cone is also round, and the side surface is fan-shaped.

★ The volume of a cylinder is three times that of a cone with equal bottom and equal height.

★ If the radius of the big circle is the diameter of the small circle, the area of the big circle is four times that of the small circle.

★ Cut out the largest circle in the square, and the side length of the square is the diameter of the circle.

★ Cut the largest circle into a rectangle, and the width of the rectangle is the diameter of the circle.

★ After the rectangle is drawn into a parallelogram, the area is smaller than before.

★ The circumference of a rectangle should be divided by 2 first, and then distributed in proportion; The sum of the edges of a cuboid can only be distributed if it is divided by 4.

★ The radius, perimeter and area of the circle are enlarged by 3 times and 9 times respectively.

★ The side length of the cube is enlarged by 3 times, the surface area is enlarged by 9 times and the volume is enlarged by 27 times.

★ The radius of the bottom surface of a cylinder or cone is enlarged by 2 times, and the volume is enlarged by 4 times.

★ Common statistical charts include bar chart, line chart and fan chart.

★ The characteristic of bar graph is that it is easy to see various quantities; The characteristic of broken-line statistical chart is that it can not only see various quantities, but also

Can clearly show the change of quantity; The characteristic of fan-shaped statistical chart is that it can clearly show the relationship between the number of each part and the total.

Complete set of mathematical calculation formulas for primary schools

1. Find the perimeter of the square ~

Ordinary: side length ×4

Alphabetic formula: C=a4

2. Find the square area ~

Normal: side length × side length

Alphabetic formula: S=aa

3. Find the perimeter of the rectangle ~

Ordinary: (length+width) ×2

Alphabetic formula: C=2(a+b)

4. Find the area of the rectangle ~

Normal: length × width

Alphabetic formula: S=ab

5. Find the circumference of a circle ~

Ordinary: diameter× π/2× π× radius

Letter formula: C=πd/C=2πr

6. Find the area of the circle ~

Ordinary: π× the square of radius

Alphabetic formula: S=πr2

7. Find the surface area of a cuboid ~

Ordinary: (length× width+length× height+width× height) ×2

Alphabetic formula: S table =2(ab+ah+bh)

8. Find the volume of a cuboid ~

Ordinary: length × width × height

Alphabetic formula: V=abh

9. Find the surface area of the cube ~

Ordinary: side length × side length ×6

Alphabetic formula: S table =aa6

10. Find the volume of the cube ~

Normal: side length × side length× side length

Alphabetic formula: V=aaa

1 1. Find the area of the triangle ~

Ordinary: bottom × height ÷2

Alphabetic formula: ah÷2

12. Find the area of the trapezoid ~

Ordinary: (upper sole+lower sole) × height ÷2

Alphabetic formula: (a+b)h÷2

13. Find the area of a semicircle ~

Ordinary: pi× square of radius ÷2

Alphabetic formula: S=πr2÷2

14. Find the area of parallelogram ~

Normal: bottom × height

Alphabetic formula: S=ah

15. Find the lateral area of a cylinder ~

Normal: circumference of cylinder bottom × height

Alphabetic formula: s side =Ch

16. Find the area of the cylinder ~

Ordinary: pi× radius square× height

Alphabetic formula: πr2h

17. Find the area of the round vertebra ~

Ordinary: 1/3 × vertebral base area× height/1/3×π× radius square.

Alphabetic formula: 1/3Sh/ 1/3πr2h

Version 2

Language:

Know 2000~5000 basic words, understand and use words, understand the content of the article and summarize the central idea, and be able to write 400-word narrative.

Math:

Four operations and application problems of integer, decimal, fraction and percentage

Understanding of length, area, volume, time and RMB unit

Understanding of line segments and angles

Calculation of perimeter of square, rectangle, parallelogram and circle

Area calculation of square, rectangle, parallelogram, triangle, trapezoid, circle, ring, sector and combination figure.

Calculation of Surface Area of Cubes, Cubes and Cylinders

Volume calculation of cubes, cuboids, cylinders and cones

* Understanding of the ball

Simple statistics

Understanding and application of ratio

Understanding and Application of Positive Proportion and Inverse Proportion

(Contents marked with * are optional)

English:

Master nearly 1000 simple words, and master the usage of general present tense and present continuous tense.