A box coutains 15 identical reams paper. The total mass of the box with 1/5of all the reams of paper. The mass of the emty box is 2/7 of a reams of paper . What í the mass of the emty box
Câu 9:
The average mass of a group of children is 47kg. If of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
Answer: The average mass of the boys is kg
Câu 10:
A 6-digit number begins with the digit 8. The number is divisible by 9 and all digits of the number are different. What is the possible smallest value of this number?
Answer:
Câu 9 : 52 kg
Câu 10 : 801234
đúng 100% nhớ tk 3 nhé
9.Young male average weight is 47 kg + (47-39) = 55 kg
10. The minimum value is 800 001
The average mass of a group of children is 47kg. If 5/13 of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
Answer: The average mass of the boys is kg
C.READING.
Complete the passage with the words in the box, then answer the questions bellow.
Broken; invented; shortage; is; papermaking; exported;
Paper was __________ (1) by the Chinese in the first century A.D. The art of papermaking took 700 years to reach the Muslim world and another 700 years to get to Britain.
Most paper __________ (2) made from wood. When the trees are cut down, they are carried by land or water to paper mills. Here they are cut up and the wood is __________ (3) up into fibers, mixed with water and chemicals. This wood pulp is then dried up on a machine and made into paper.
Papermaking is an important British industry, and paper from Britain is __________ (4) to South Africa, Australia and many other countries. Some of the wood used in British __________ (5) industry comes from trees grown in Britain, but wood is also imported from other countries such as Norway. One tree is needed for every 400 copies of a forty-page newspaper. If half the adults in Britain each day buy one daily paper, this uses up over 40,000 trees a day. Trees are cut down faster than they can be replaced, so there may be a paper __________ (6) before the year 2020.
Answer the questions:
1.Who was paper invented by?
-> ………………………………………………………………………………
2.What is paper made from?
-> …………………………………………………………………………………………
3.Where is paper from Britain exported to?
-> ………………………………………………………………………………………
4.What is the passage about?
-> ……………………………………………………………………………………………
1. invented
2.is
3.broken
4.exported
5.papermaking
6.shortage
1.Who was paper invented by?
Paper was invented by the Chinese
2.What is paper made from?
Paper is made from wood.
3.Where is paper from Britain exported to?
Paper from Britain is exported to South Africa, Australia and many other countries
4.What is the passage about?
The passage is about papermaking.
Paper was ______invented ____ (1) by the Chinese in the first century A.D. The art of papermaking took 700 years to reach the Muslim world and another 700 years to get to Britain.
Most paper ____is______ (2) made from wood. When the trees are cut down, they are carried by land or water to paper mills. Here they are cut up and the wood is _____broken_____ (3) up into fibers, mixed with water and chemicals. This wood pulp is then dried up on a machine and made into paper.
Papermaking is an important British industry, and paper from Britain is ____exported______ (4) to South Africa, Australia and many other countries. Some of the wood used in British _____papermaking_____ (5) industry comes from trees grown in Britain, but wood is also imported from other countries such as Norway. One tree is needed for every 400 copies of a forty-page newspaper. If half the adults in Britain each day buy one daily paper, this uses up over 40,000 trees a day. Trees are cut down faster than they can be replaced, so there may be a paper _______shortage___ (6) before the year 2020.
Answer the questions:
1.Who was paper invented by?
-> …………………………………… Paper was invented by the Chinese…………………………………………
2.What is paper made from?
-> ……………………………… Most paper is made from wood…………………………………………………………
3.Where is paper from Britain exported to?
-> ………………………………… South Africa, Australia and many other countries……………………………………………………
4.What is the passage about?
-> …………………………Papermaking………………………………………………………………
Câu 10:
The average mass of a group of children is 47kg. If 5/13 of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
Answer: The average mass of the boys is kg
Google dịch :
"Khối lượng trung bình của một nhóm trẻ em là 47kg. Nếu 5/13 của số trẻ em là con gái và khối lượng trung bình của họ là 39kg. Tìm khối lượng trung bình của các chàng trai.
Trả lời: Khối lượng trung bình của các chàng trai là kg
Câu hỏi tương tự Đọc thêm"
Góp ý với bạn nên viết đề bằng Tiếng Việt
Số em nam :
13 - 5 = 8 ( em )
Tổng cân nặng của 13 em :
47 x 13 = 611 ( kg )
Tổng cân nặng của các em gái :
39 x 5 = 195 ( kg )
Tổng cân nặng của các em nam :
611 - 195 = 416 ( kg )
Trung bình mỗi em nam cân nặng :
416 : 8 = 52 ( kg )
The average mass of a group of children is 47kg. If of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
dịch: khối lượng trung bình của một nhóm trẻ em là 47kg. Nếu số lượng trẻ em là con gái và khối lượng trung bình của họ là 39kg. Tìm khối lượng trung bình của các chàng trai.
dap so ra 52
k mik nha
nam nay em len lop 6 oi
bai nay tinh bang cach nao vay
số em nam là
13-5=8 hs
tong so can cua 13 em la
47x13=611 hs
tong can nang cua cac em gai la
39x5=195 can
tong so can nang cua cac em nam la
611-195=416 can
tb moi em nam can nang
416:8=52 kg
k mik nha
III. Complete the sentences with the correct form or tense of the verbs in the box.
respect wrap worship pass take reflect reunit break |
1. She ___________ the present in red paper and tied it with yellow ribbon.
2. All students should ___________ their teachers.
3. The culture of xoe dancing ___________Thai people’s lifestyle and culture.
4. We decided ___________ with tradition and go away for Tet holidays.
5. In my family the tradition that has been ___________ down is eating together every Sunday.
6. Almost every Vietnamese household sets an altar ___________ their ancestors.
7. It is considered very impolite not _________ off your shoes before entering a house in Japan.
8. Lots of people come back ___________ their families during Tet holiday
1 wrapped
2 respect
3 reflects
4 to break
5 passed
6 to worship
7 to take
8 to reunite
The mass of 300 indentical cans is 4.5 kg. What is the mass of a can in gam ?
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Any list of the greatest thinkers in history contains the name of the brilliant physicist Albert Einstein. His theories of relativity led to entirely new ways of thinking about time, space, matter, energy, and gravity. Einstein's work led to such scientific advances as the control of atomic energy, even television as a practical application of Einstein's work. In 1902 Einstein became an examiner in the Swiss patent office at Bern. In 1905, at age 26, he published the first of five major research papers.
The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension. The second paper laid the foundation for the photon, or quantum, theory of light. In it he proposed that light is composed of separate packets of energy, called quanta or photons, that have some of the properties of particles and some of the properties of waves. A third paper contained the "special theory of relativity" which showed that time and motion are relative to the observer, if the speed of light is constant and the natural laws are the same everywhere in the universe.
The fourth paper was a mathematical addition to the special theory of relativity. Here Einstein presented his famous formula, E = mc2, known as the energy mass equivalence. In 1916, Einstein published his general theory of relativity. In it he proposed that gravity is not a force, but a curve in the space-time continuum, created by the presence of mass. Einstein spoke out frequently against nationalism, the exalting of one nation above all others. He opposed war and violence and supported Zionism, the movement to establish a Jewish homeland in Palestine. When the Nazis came to power in 1933, they denounced his ideas.
He then moved to the United States. In 1939 Einstein learned that two German chemists had split the uranium atom. Einstein wrote to President Franklin D.Roosevelt warning him that this scientific knowledge could lead to Germany developing an atomic bomb. He suggested the United States begin its own atomic bomb research.
What is “Brownian movement”?
A. The zig-zag motion of microscopic particles in suspension.
B. The emission of electrons from solids when struck by light.
C. The motion of photons in light.
D. The basis of the theory of relativity.
Đáp án A.
Key words: Brownian movement
Clue: The first one provided a theory explaining Brownian movement, the zig-zag motion of microscopic particles in suspension: Người đầu tiên đưa ra một học thuyết giải thích sự vận động Brownian, sự chuyển động theo đường zigzag của các hạt vi mô trong hệ thống treo.
Dễ thấy đáp án đúng là A. The zig-zag motion of microscopic particles in suspension.
Read the passage, then answer the questions.
Every day of the year throughout the world, about twenty million paper bags and newspapers are screwed and thrown away
Making paper requires a lot of wood pulp and the work of million of workers. Many countries have had plans to recycle waste paper to save money and labor. In countries where there is the cooperation of the public, paper mills recycle as much as sixty percent of waste paper. Their simple work is to take away the ink, crush it and make it into pulp again. For every ton of recycled newsprint, twelve trees can be saved. We can insist that the more paper people save, the more trees are preserved.
l. How many paper bags and newspapers are thrown away every day?
2. What material do paper mills need to make paper?
3. What have many countries done to save money and labor in making paper?
4. What percentage of waste paper is recycled with the help of the public?
5. What do the paper mills do to reuse waste paper?
6. How many trees can be saved for every ton of recycled newsprint?
Read the passage, then answer the questions.
Every day of the year throughout the world, about twenty million paper bags and newspapers are screwed and thrown away
Making paper requires a lot of wood pulp and the work of million of workers. Many countries have had plans to recycle waste paper to save money and labor. In countries where there is the cooperation of the public, paper mills recycle as much as sixty percent of waste paper. Their simple work is to take away the ink, crush it and make it into pulp again. For every ton of recycled newsprint, twelve trees can be saved. We can insist that the more paper people save, the more trees are preserved.
l. How many paper bags and newspapers are thrown away every day?
=> Every day of the year throughout the world, about twenty million paper bags and newspapers are screwed and thrown away.
2. What material do paper mills need to make paper?
=> Making paper requires a lot of wood pulp and the work of million of workers. .
3. What have many countries done to save money and labor in making paper?
=> Many countries have had plans to recycle waste paper to save money and labor.
4. What percentage of waste paper is recycled with the help of the public?
=> In countries where there is the cooperation of the public, paper mills recycle as much as sixty percent of waste paper.
5. What do the paper mills do to reuse waste paper?
=> Their simple work is to take away the ink, crush it and make it into pulp again.
6. How many trees can be saved for every ton of recycled newsprint?
=> For every ton of recycled newsprint, twelve trees can be saved.
II. Read the following text and use the words given in the box to fill in the blanks.
due to about depth likely of
surface amounts some miles more
The moon very (l) _____________ has a very small core, just 1 to 2 percent of the moon's mass and roughly 420 (2) _____________ (680 km) wide. It likely consists mostly (3) _____________ iron, but may also contain large (4)_____________ of sulphur and other elements.
Its rocky mantle is (5) _____________ 825 miles (1,330 km) thick and made up of dense rocks rich in iron and magnesium. Magmas in the mantle made their way to the (6) _____________ in the past and erupted volcanically for (7)_____________ than a billion years - from at least four billion years ago to fewer than three billion years past.
The crust on top averages (8) _____________ 42 miles (70 km) deep. The outermost part of the crust is broken and jumbled (9) _____________ all the large impacts it has received, a shattered zone that gives way to intact material below a (10) _____________ of about 6 miles (9.6 km).
1 like
2 miles
3 of
4 amounts
5 about
6 surface
7 more
8 some
9 due to
10 depth