![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Junior high school mathematics book Volume 1, page 24 exercise (in the inquiry below) 4 problem formula Plus answer!
3-5
2. The original formula = 3.5 + 3.5 - [2.4 + 4.6] = 7-7 = 0
3. The original formula = - 5-7-4 + 10 = - 6
4. Original formula = 12 / 9-12 / 42-12 / 2 + 12 / 8-1 = - 3 4 / 1
A junior high school mathematics problem, help to solve! A total of 5 million tickets of three kinds of lotteries are issued in a certain place, and the amount of lottery tickets of a, B and C is equal, and each lottery ticket of a and B is 2 yuan, and each ticket of type C lottery ticket is 1 yuan, and a total of 9 million pieces of three kinds of lottery tickets are issued. How many tickets are issued for each of the three kinds of lottery tickets? How many kinds of lottery tickets have been issued in B, B and C, each with a total amount of RMB 900, 000 each?
Let B and B each have X 10000 pieces, then C is 500-2x
2X + 2x + 1 * (500-2x) = 900
The solution is: x = 200
That is, Party A and Party B are 2 million pieces respectively, and C is 1 million pieces
One day, he and his mother went to buy bamboo poles. If the length, width and height of the elevators were 1.5 meters, 1.5 meters and 2.2 meters respectively, then what was the maximum length of bamboo poles that could be put into the elevator? (accurate to 0.1 M)
In the case of A1, C1, r = 1.5 m=
1．52+1．52=
4.5，
In RT △ a1c1c, A1C=
(
4.5)2+2．22≈3.1m
The maximum length of the bamboo pole that can be put into the elevator is about 3.1 meters
Who has the problem of Pythagorean theorem in Volume 1 of Grade 8
In RT △ ABC, ∠ ACB = 90 °, BC = radical 3, AC = 2, Radix 6. Find the length of high Cd on the hypotenuse ab?
(the answer is 2 / 3 root sign 6) what you think ~!
50 problems in Pythagorean theorem
Too many. I'll give you one to imitate and make a few more. I know that the two right angles are 3 and 4 respectively, and the length of the oblique side is required
How to write the first problem of 1.3 on page 15 of Pythagorean theorem How to write the first problem of 1.3 (truck passing through the tunnel) on page 15 of Pythagorean theorem
There is no way to draw a picture here. You can draw a rectangle (that is, a car) first. Make a semicircle with the midpoint of a long side of the rectangle as the center of the circle and the line between the midpoint and one corner of the rectangle as the radius. We can see that the square of the radius is 2.4 square + 1.5 square, and the radius is 2.83
How to write the second problem of 1.3 on page 15 of Pythagorean theorem Better have a process, write well and add 50 points! 1 hour later the answer is invalid! Closed
subject
Pythagorean theorem, page 19, question 2
Because in the square ABCD, the triangles ABC, def and FBC are right triangles
So be squared = AE squared + Ba squared = 20
The square of EF = FC + BC = 5
BF squared = FC squared + BC squared = 25
So the square of be + the square of EF = the square of BF
That is, the triangle BCF is a right triangle
Pythagorean theorem, page 29, question 12
There are three cases: the first is to expand the long square on the front and right to find the position of a and B, and then use the Pythagorean theorem to solve the problem. The second method is to expand the long square from the top and the right to find the position of a and B, and then use the Pythagorean theorem to solve the problem. The third method is to expand the long square from the back to the top to see the positions of a and B, Then use Pythagorean theorem to solve. Compare the three cases, the shortest one is the final answer
Compulsory education curriculum standard experimental textbook Chinese grade seven volume one Shen Xia's translation of children's interest is urgent
translation
I recall that when I was young, I could open my eyes to the sun, and my eyesight was excellent. When I met a small thing, I must carefully observe its texture, so I could often feel the joy of detached things
In the summer night, mosquitoes make thunderous calls. I compare them to cranes flying in the air. I think that there are hundreds of white cranes in front of me. Looking up at them, even their necks become stiff. I leave some mosquitoes in the white tent and spray them slowly with smoke to make them fly and bark at the smoke, forming a picture of white cranes with clouds and clouds, If it was like a flock of cranes on the edge of the blue clouds, it made me very happy
I often squat down to make my body as high as the platform on the uneven wall, where there are weeds on the flower terrace. I regard the Bush grass as a forest, insects and mosquitoes as wild animals, the protruding part of the soil block as a hill, and the sunken part as a gully. I would like to visit in this realm, happy and satisfied
One day, I saw two small insects fighting each other among the grass, and I was very interested in it. Suddenly, a huge beast pulled up a mountain and fell down a tree. It turned out to be a toad. When I was young, I could see the God. I could not help but scream. When I recovered, I caught the toad and whipped it dozens of times, Drive it to another yard
RELATED INFORMATIONS
- 1. Exploration on the expansion of 94 pages in the experimental textbook of compulsory education curriculum standard
- 2. Why is Pythagorean theorem the first mathematical theorem discovered by human beings? When I studied the Pythagorean theorem, I felt that the discovery of this theorem was not simple. Why do many countries say that the Pythagorean theorem is the earliest mathematical theorem they know. Is this accidental or
- 3. Chapter nine arithmetic problems The water surface of a pool is 10 feet square. In the center, there is a reed which is one foot higher than the water surface. If you pull it vertically to the bank, its top just reaches the surface of the bank. Ask the water depth and the length of the reed
- 4. Zuchongzhi also wrote a book called‘
- 5. Find some English stories. Do me a favor. On Wednesday, I have to Hope is some fairy tales in English
- 6. What do you mean by listening? Be simple and clear! Use it in primary school science
- 7. Find 20 Pythagorean theorem to solve more problems!
- 8. The problem of calculating the area of double knobs by integral It seems that θ can't take pi / 4 to pi / 2? When drawing, is the graph in the first quadrant only 0 to pi / 4? So when integrating in polar coordinates, the upper limit of integration is pi / 4, right? And I still don't know whether the angle in polar coordinates is determined by the angle between the X axis and the X axis, and the graphs with angles not in the defined domain will not be drawn Although it seems that the graph is continuous, its value of θ is not continuous, is it? Thank you!
- 9. The definition of Pythagorean theorem, specific
- 10. Chinese mathematicians Who knows? Easy!
- 11. 2005x－2007y＝2003 2004x－2006y＝2002 x. How much y
- 12. If the rational number a is greater than the rational number B, then () A. The absolute value of a is greater than that of B B. The absolute value of a is less than that of B C. The opposite number of a is greater than that of B D. The opposite number of a is less than that of B
- 13. The answer to the latest test paper of compulsory education curriculum standard experimental textbook published by people's Education Press I am a teacher, I want to let students read early at the end of the term!
- 14. The Beijing Tianjin Intercity Railway will be put into operation on August 1, 2008. It is estimated that the one-way direct operation time of high-speed train between Beijing and Tianjin will be half an hour. In a test run, the running time of the test train from Beijing to Tianjin is 6 minutes longer than the expected time, and the travel time from Tianjin to Beijing is the same as the expected time The average driving speed is 40 kilometers per hour. What is the average speed from Beijing to Tianjin during the test run?
- 15. On the number axis, an ant starts from the origin and crawls 1 unit length to the right for the first time, then 2 units to the left for the second time, 3 units to the right for the third time, and 4 units to the left for the fourth time, Question: (1) where is the last position of the ant on the number axis? (2) what is the sum of the numbers corresponding to the positions reached after each crawl? (3) how long has the ant crawled
- 16. 1.（10-11）×（11-12）×（12-13）×… ×（99-100）=_____ . 2. - 1 - (- 5 and 1 / 2) × (+ 3 / 11) [main process] 3.2 / 3 × (- 1 / 2) - (- 1 and 1 / 2) × (- 1 and 1 / 3) [main process] 4. Simple calculation: 15 × (- 3 / 5 + 1 / 3) - 24 × (5 / 12-7 / 8) [main process] 5. Using a simple method to calculate: - 8 × (- 13 and 7 / 12) - (- 5) × (- 13 and 7 / 12) + 4 × (- 13 and 7 / 12) [main process] 6. Two kinds of operations are defined as follows: + 0means "+ there is a circle outside" × "means" × there is a circle outside ". For any two rational numbers a, B has: a + ○ B = a + B-2, a ×0b = a · B-2. Find the value of - 4 × (6 + ○ 8)
- 17. According to the book classification of Xinhua Bookstore, understand the classification of society
- 18. Xiaoming and Xiaogang go to the library to borrow books. Xiaoming goes once every nine days and Xiaogang goes once every six days. If they meet in the library on February 2, what day will they meet again in the library?
- 19. On June 1, I went to Xinhua Bookstore to buy a book. Walking into the bookstore, it was like walking into the sea of books. I crowded into the crowd and bought a copy of "youth composition guide". I was very happy. At this time, a young pioneer ran over and saw that he was very anxious. He also wanted to buy the book, but the odd number had been sold out. I gave my book to him, and the sales assistant and aunt saw this scene, Laugh. (enlarge it into a composition of more than 400 words) On June 1, I went to Xinhua Bookstore to buy a book. Walking into the bookstore, it was like walking into a sea of books. I crowded into the crowd and bought a copy of "youth composition guide". I was very happy. At this time, a young pioneer ran over and saw that he was very anxious. He wanted to buy the book, but the book was sold out. I gave my book to him, and the shop assistant and aunt saw this scene, Laugh. (according to the above story content, please expand reasonable imagination, and write things in detail. If you can't write more than 400 words, you can also make an outline)!
- 20. Use the solution of one variable linear equation According to the plan, one third of a highway can be completed in 18 days. If the work efficiency is improved by one fifth after four days of work, how many days can we finish half of it?