2. A garbage treatment plant receives 70 cars of domestic garbage every day, and each car can recycle about tons of garbage on average. /kloc-how many tons of recyclable garbage did you collect in 0/5 days?
3. The average daily milk output of each cow in this dairy farm is 100 tons. How many tons of milk can 42 cows 100 days produce?
4. The running speed of Altair is 26 km/s, and Vega belongs to Altair. How many kilometers does Vega run per second?
5. The velocity of human blood in artery is 50 cm/s, the velocity in meridian is in artery, and the velocity in capillary is only in meridian. How many centimeters does the blood in the capillary flow every second?
There are 36 students in our class, some of whom want to be teachers when they grow up. The number of people who want to be scientists is the number of people who want to be teachers. How many students want to be scientists?
7. The life span of walrus is about 40 years. Sailors are walruses and seals are sea lions. How many years can seals live?
8. People's heart rate changes with age. Teenagers beat about 75 times a minute, and babies beat more than teenagers. How many times does the baby's heart beat every minute?
9. It is best not to exceed the weight of children. If you carry heavy objects for a long time, it will lead to backache and even seriously hinder bone growth. Wang Ming's schoolbag weighs 5 kg and 30 kg. Are you overweight?
The world population reached 6 billion in 10 and 1999, and it is expected to increase in 20 13. How many billions will the world population reach in 20 13 years?
12. Teachers and students in grade five donated books to Hope Primary School 150, and the number of donations in grade six exceeded that in grade five. Sixth grade teachers and students
How many books have you donated?
13, Mingguang Primary School used 600 kwh of electricity last month, less than last month. There is a lot of electricity consumption this month.
Less kwh?
14. Serious soil erosion causes about1600 million tons of sediment to enter the Yellow River every year, in which the sediment sinks.
Accumulate in the river, and the rest are taken to the estuary. How many tons of sediment are brought into Haikou?
15, Cryptomeria fortunei can absorb tons of sulfur dioxide every year. How many tons of sulfur dioxide can Cryptomeria fortunei absorb each year?
16. There are 20 willows in the campus, which belong to poplars and Sophora japonica. How many locust trees are there?
17. put 1 l orange juice in a small bottle with a capacity of 1 l. How many bottles can you hold?
18, Grandpa Chen runs six laps around the playground every day and half a lap in two minutes. At this rate, how long will Grandpa Chen run every day?
19. The building where Xiaoping lives * * has 15 floors and is 42 meters high. Her family lives on the sixth floor. Xiaoping's house has a floor to the ground.
How high?
20. Uncle Li wanted to record a paper for three hours. At this rate, Uncle Li works eight hours, but
A few minutes into this paper. How many parts are still unfinished?
2 1, a * * * has 240kg of fruit candy, kg per bag. Just finished now. How many bags have been filled?
22. The doctor said to take half a tablet every time, three times a day. How many days can I take this box of medicine *** 12 tablets?
There are 320 popular science books in the school, accounting for 30% of all books. Popular science books are equivalent to story books.
(1) How many books are there in the library?
(2) How many story books are there in the library?
There are 25 people in the art troupe. There are more people in the art group than in the model airplane group. How many people are there in the model airplane team?
25. Xiaohong read 35 pages of extracurricular reading at the weekend, which happened to be extracurricular reading. This extracurricular reading
How many pages are there in Martial Arts?
26. A cup of fresh milk of about 250ml contains about g of calcium, which accounts for an adult's daily calcium.
. About how much calcium does an adult need a day?
27. The speed of artificial earth satellite is 8km/s, which is equivalent to the speed of spacecraft. Spaceship's
What is the speed?
28. In general, the mass of ice with the same volume is less than that of water. Now there is a piece weighing 9kg.
Dear ice, if there is a bucket of water with the same volume as this fast ice, how much does it weigh?
29. My monthly salary is 1500, and your mother's monthly salary is 1000. The monthly expenses will account for about us.
The salary of two people. What is the monthly expenditure of our family?
A TV factory produced 480,000 TV sets in the first half of last year and in the second half. This TV
What was the output of this machine factory last year?
3 1, China has a vast territory, with a distance of 5,200 kilometers from east to west and north and south from east to west. How many kilometers is it between north and south?
32. The rice was transported to the disaster area. It took four cars to get there. How much money does this batch of rice carry on average per car?
What is this? How many cars do you need to transport the surplus rice?
The volume ratio of oxygen and hydrogen in air is 2 1:78. How many cubic meters of oxygen and hydrogen are there in 660 cubic meters of air?
The ratio of cement, sand and stone is 2:3:5. To mix 20 tons of such solidified soil, cement and sand are needed.
How many tons of seeds and stones are there?
35. Make a rectangular box with a line of 120cm, and the ratio of length to width is 3:2: 1. This is very long.
What are the length, width and height of a cube?
36. My vegetable field is 800 square meters, and I'm going to grow tomatoes. The remaining area ratio is 2: 1.
Grow cucumbers and eggplants. How many square meters are these three vegetables?
37. Uncle Zhang keeps 200 geese, and the number of geese belongs to ducks. How many ducks do you have?
38. Uncle Zhang has raised 200 geese, the number of which is less than that of ducks. How many ducks do you have?
39. Uncle Zhang keeps 700 geese and ducks, and the ratio of ducks to geese is 5:2. How many ducks and geese are there respectively?
When ice melts into water, the volume of water becomes the volume of ice. A piece of ice melts into water.
The product is 30 square decimeters. What is the volume of this ice?
4 1. The "Summer Solstice" in China lunar calendar is the longest day and the shortest night in a year. On this day, Beijing
The ratio of day time to night time is 5: 3. How many hours are day and night?
42. A warehouse stores 65,438+050 tons of rice, 60 tons of flour and 65,438+05 tons of miscellaneous grains. Excuse me, what is stored in this warehouse?
Proportion of rice, flour and miscellaneous grains. And turn it into the simplest integer ratio.
Xiaodong has a bike. The diameter of the wheel is about 66 cm. If it turns 100 revolutions per minute on average, it will change from
The distance from home to school is 2000 meters. How many minutes does it take?
44. The minute hand of the wall clock is 20 cm long. After 30 minutes, what is the distance traveled by the tip of the minute hand?
Rice? In 45 minutes?
45. The radius of the circular cowshed is 15m. How long does it take to circle the cowshed three times? (United)
If a stake is installed every 2 meters, how many stakes will be installed?
46. Cut out the largest circle on a square paper with a perimeter of 100cm, and the radius of this circle is
How many centimeters?
47. The range of automatic rotary sprinkler irrigation device on the park floor is 10m. What is the area it can spray irrigation?
48. The circumference of the trunk is 125. 6 cm. What is the cross-sectional area of this trunk?
49. As shown on the right, the two ends of the playground are semicircular. The sport
What is the perimeter of this field? How many square meters is the area?
50. What is the radius of welding a circular iron ring with a length of 12.6cm?
5 1, 2000 kg of peanut kernel can squeeze out 760 kg of oil. What is the oil yield of these peanuts? Zha456
How many kilograms of peanuts does one kilogram of oil need?
52. Today, there are 43 students in Class 3, Grade 5, and they are on leave 1 person. What's the attendance today?
53. Planned afforestation 12 hectares, actual afforestation 14 hectares. What percentage of actual afforestation is more than planned?
54. Xiaofeijia used to use 10 tons of water every month, but after improving the faucet, it used 9 tons of water every month, saving more than before.
About a few percent?
55. The workshop of a factory planned to process 2000 parts, but actually processed 2200 parts, which actually increased production than planned.
What percentage?
56. There were 2,800 students in a primary school last year, a decrease of 0.5% compared with last year. How many students are there this year?
57. A typist typed 1600 words, which is exactly 40% of the full text. This typist needs to type.
How many words? How many words have not been typed?
58. Primary and secondary schools in the new urban area carried out waste paper recycling activities, and 87.5 tons of waste paper were recycled. Using waste paper to produce recycled paper
The recovery rate is 80%. How many tons can these recycled waste papers produce?
59. The number of boys in Chengguan No.1 Primary School and Chengguan No.2 Primary School accounts for 52% and 54% of the total number of students in the school respectively. Chengguan 1 ST primary school
There are 800 students and 750 students in Chengguan No.2 Primary School. Which school has more boys? How many people are there?
60. Of the 480 students in Baihua Hutong Primary School, only 5% did not participate in accident insurance. ensure
How many students are there?
61.In 2002, there were 1263 academicians in China Academy of Sciences and China Academy of Engineering, including male academicians 1 185.
What percentage of academicians are women?
62. With a discount card, you can get a 20% discount. Buying this toy with a discount card saves 9.6 yuan. This toy is original.
What is the price?
63. The price reduction of a computer is 10% lower than the original price of 7600 yuan for the first time and 10% for the second time.
What's the current price of this computer?
64. There are *** 10 bicycles and tricycles with 26 wheels. How many bicycles and tricycles are there?
65. There are 30 large and small steel balls in the box, weighing 26g. It is known that each large steel ball is 1 1g and each small steel ball is 1g.
7 g. How many big steel balls and small steel balls are there in the box?
66. Three students jump rope. Xiao Ming jumps 120, Xiao Qiang jumps Xiao Ming and Liang Xiao jumps Xiao Qiang.
Yes How many did Xiao Liang skip?