2. Junior three students go to the vegetable garden to collect cabbages, which are divided into four groups, each group 1 1 person, with an average of 45kg per person. A * * * How many kilograms of cabbage?
1. The chemical fertilizer plant plans to produce 7,200 tons of chemical fertilizer, which has been produced for four months, with an average of 1200 tons of chemical fertilizer per month, leaving 800 tons per month. How many months will it take to complete the production?
2. The plastic factory planned to produce 1300 plastic modules, and produced 780 plastic modules in 6 days. According to this calculation, how many days will it take to produce the rest?
Li Shifu produced 252 parts in four hours in the morning, and worked at this speed for three hours in the afternoon. How many parts does Li Shifu produce on this day?
The cement plant plans to produce 3600 tons of cement, which will be completed in 20 days. In fact, it produces 20 tons more than planned every day. How many days does it actually take to complete the task?
5. A pile of 3.6 tons of coal is planned to burn 10 day. After improving the stove, it saves 0.06 tons per day compared with the original plan. How many days can this pile of coal burn now?
Fifth grade application problem (1)
1. Xiaohong's height 156 cm, Xiao Fang's height 1.52 m, how much is Xiaohong taller than Xiao Fang?
2.50 kg rapeseed can extract 15 kg oil. According to this calculation, how many kilograms of oil can be extracted from 5 tons of rapeseed?
3. Xiaoming's home is away from school 1.5km, and Xiaonan's home is away from school 1km. How close is his home to the school?
4. An African ostrich is about 150kg 500g, and a pig is about123.06kg. How many kilograms is an ostrich heavier than a pig? Write the result as a compound number.
The sowing width of a seeder is 3 meters, and the seeder travels 5 kilometers per hour. According to this calculation, how many hectares can be sown in 2 hours?
4. The road team repaired 1.078km on the first day, and 0.456km more on the second day. How many kilometers did the road team build in two days? I hope primary school students can save 40.25 yuan by repairing desks and chairs, and 3.7 yuan saves less money by binding books than by repairing desks and chairs.
Xiao Liang's father bought him a computer desk and chair. The price of the chair is 45 yuan, which is cheaper than the table 12.5 yuan. How much is a table?
6. In the long jump competition of the sports meeting, Xiaohong scored 2.85 meters, Xiaoming jumped 1.25 meters more than Xiaohong, and Xiaohong jumped 0.23 meters more than Xiao Ju. Who won the first place in the long jump and why?
7. Students in Zhangzhuang Primary School spent 40.25 yuan on repairing desks and chairs, more than 3.7 yuan who bound books. How much does it cost to bind books (equation solving)?
8. Tiger walked from home to school in the morning1.3km. After walking 0.3 km, I found that I didn't bring my math exercise book, so I went home to get it. So how many kilometers did he walk to school than usual?
9. suguo supermarket shipped 0.3 1 ton of cantaloupe, and watermelon was 2.75 tons more than cantaloupe. How many tons did the two melons ship?
10, Aunt Zhang packed a basket of vegetables and sold them at the farmer's market. The original weight of baskets and vegetables was 7.4 kilograms. After selling some vegetables, she went home and weighed it, 3.6 kilograms. How many kilograms of vegetables did she sell?
1 1, three people take part in the 60-meter race. Liu Mingyong took 9.6 seconds, Li Qiang was 0.5 seconds slower than him and Zhao Liang was 0.2 seconds faster than Li Qiang. What's their ranking?
12, the school used 200 yuan to buy books, science and technology books 87 yuan 50, story books 32 yuan 04. How much is left?
13, A and B are 220 meters apart, and Obana Xiaohong comes from A and B respectively. Xiaohua walked 85.2 meters, Xiaohong walked 70.5 meters, how many meters were separated between them?
14, Xiaoming bought a pen and a diary. The unit price of pen is 12.7 yuan, and the price of diary is 4.5 yuan. Xiao Ming pays 20 yuan, a salesman. How much should he get back?
15, a bottle of oil weighs 3.4 kg. Half of it is used, and the bottle weighs 1.9 kg. The original bottle was as heavy as oil.
16, build a highway, 134.5 km has been repaired, and the rest is less than that repaired 13.6 km. What is the total length of this highway?
17, a bamboo pole is vertically inserted into the pool. The mud settling part of bamboo pole is 0.6m, the dew part is 0.7m, and the pool depth is 2m. How long is this bamboo pole?
18, a 4.8-meter-long bamboo pole is vertically inserted into the pool. The muddy part of bamboo pole is 0.3m, and the exposed part is1.75m.. What is the depth of the swimming pool?
Application problems (2)
1, Xiao Qiang took 15 yuan to go shopping in the supermarket. The prices of some goods in the supermarket are as follows:
Notebook (notebook)
Pencil (branch)
Ruler (root)
Knife (handle)
Triangular plate (pair)
Pen (branch)
6.30 yuan
0.60 yuan
1.20 yuan
2.4 yuan
4.50 yuan
6.70 yuan
Xiao Qiang can only buy a few kinds of goods at most.
(2) If I buy two pens, how much should I refund?
2. The perimeter of the triangle is 16.4cm, in which the first side and the second side are 5cm respectively. How long is the third side?
3. Xiao Zhang, Xiao Li and Xiao Wang weigh themselves. The total weight of Xiao Zhang and Xiao Li is 90.8 kg, and the total weight of Xiao Wang and Xiao Li is 88.5 kg. How many kilograms is Xiao Zhang heavier than Xiao Wang?
The Zhang family planted three responsibility fields. The first one is 1080 m2, which is more than the second one 15.7 m2, and the third one is 8.5 m2 less than the first one. Please ask at least two questions and answer them according to what you know.
5. Dad is 0.52 meters taller than Xiaohong, 0.2 1 meter taller than Mom, and how many meters taller than Xiaohong?
6. The supermarket has an infrared remote control tank toy, the price is 130.00 yuan, which is cheaper after the discount 13.00 yuan. Xiaoming is going to buy this toy tank with the money from buying two mini cars, each 55 yuan. Does he have enough money? If not, how much money is left?
7. This year, the cement plant allocated 3.324 million yuan for pollution control, 2.347 million yuan for sewage tank renovation, and another 855,000 yuan. How many million yuan does the factory have for pollution control now?
8.b is in the middle between A and C. After the car A is released from A for 48.5 kilometers, it is still 14.5 kilometers away from B. At this time, how many kilometers is the car from C?
9. The original price of a children's suit in Asia is 125.90 yuan, and the promotion price for celebrating June 1st is 98.80 yuan. How much cheaper?
10, Xiao Wang weighs 36.5 kg, Xiao Li weighs 4 1.4 kg, and sumo wrestlers weighs 125.8 kg. How many kilograms does this athlete weigh more than Xiao Wang and Xiao Li combined?
1 1, Xiao Qiang is 0. 19 meters higher than Xiao Fang, Xiao Fang is 22 centimeters shorter than Tiger, and Tiger is several meters taller than Xiao Qiang.
12, someone bought an item and paid it to 50 yuan, the shop assistant. The clerk misread the decimal point of this item and gave him 46.75 yuan. He said he found too much. What is the price of this project?
13, the fruit shop sent three baskets of apples, 30.5 kg each. How many kilograms did a * * * send? If the price of apples per kilogram is 2.6 yuan, how much can these apples earn?
14, the average daily electricity consumption of the school 17.3 kwh, how many kwh will be used in May? If you use 0.5 yuan per kilowatt hour, how much electricity will you pay this month?
15, Wuxi Lingshan Giant Buddha is 88 meters high, which is 1. 15 times higher than Sichuan Leshan Giant Buddha. How high is Leshan Giant Buddha in Sichuan?
16, the fruit shop sells 32.5 Jin of apples every day, which is 0.9 times that of the first day every two days.
How many catties of apples do you sell the next day? How many kilograms do you sell the next day?
17, Xiaoming bought two composition books in the bookstore, one 10.8 yuan and one 7.6 yuan. He paid 20 yuan. How much should he get back?
Application problems (3)
1, the turnover of Li Hong Supermarket on Monday was 23,500 yuan, and the turnover on Tuesday was 1.3 times that on Monday. How much more than 10 thousand yuan a day (the result is reserved to one decimal place)
2. The length of a window glass is 1.3m, and the width is 1. 1m, so how many square meters of glass is needed to make 12 such windows (the result is an integer).
3. The length of parallelogram land is 3.5m longer than its height. Known base length16.8m. What is the area of this land?
3 yuan per kilogram of apples, 2.2 yuan per kilogram of oranges, and Xiaoming bought 5 kilograms of apples and oranges with 30 yuan money respectively. How much should he get back?
5. The average of the three numbers A, B and C is 5, and half of the two numbers B and C is 4.5. What's the number of a?
6. The school handicraft group made 28 handicrafts with 95.2 square decimeters of colored paper. How many square decimetres of paper does each handicraft use on average?
7. Xiao Minghua 16.5 yuan bought 5 kilograms of apples, and Xiao Honghua 2 1.7 yuan bought 7 kilograms of apples. Who bought it more expensive? 8. Four giant pandas ate 36.24 kilograms of bamboo leaves in three days. How many kilograms of bamboo leaves does each giant panda eat on average every day?
9. The distance between Party A and Party B is 66 kilometers. It takes 1.2 hours for the ship to get from A to B, and 1 hour for the return trip. What is the average speed of the ship going back and forth?
10, 120 kilograms of rapeseed can extract 38 kilograms of rapeseed oil, and how many kilograms of rapeseed oil can be extracted per kilogram (the result is retained after one decimal point).
1 1, a rectangular vegetable field, which is 1 1 m long and 2m longer than its width. In this vegetable field, 445.5 Jin of cabbage is harvested. How many Jin of cabbage is harvested per square meter on average?
12, a batch of 75 tons of goods has been shipped six times, leaving 4 1.4 tons. How many tons are shipped on average, and how many times will the rest be shipped (the result remains an integer)
13, class five (1) has 45 people joining the interest group, which is 1.5 times that of class five (2). How many people in Class Two joined the interest group?
14, the average of five numbers is 19.68, the average of the first three numbers is 18.9, and the average of the last three numbers is 29.4. What's the middle number?
15, a flour mill 1 hour can grind 5.6 kilograms of flour, so how many kilograms can this flour mill grind in 4.5 hours?
16, the circumference of a square is 5.6 decimeters. How many square decimetres is the area of this square?
17, Xiaoming and his father play electric plane. When buying a ticket, Xiao Ming pays 10 yuan and takes it back to 2.5 yuan. The fare of electric plane is half that of adults, so how much are the student tickets and adult tickets?
18, Xiaoming spent 48.64 yuan in pocket money in March, which is 3.2 times that of Xiaohong. How much pocket money does Xiaohong have this month?
19, the area of a rectangle is 2 1 square decimeter, and the length is 5 decimeters. What is its circumference?
20. Miss Wang bought 6 Jin of oranges with 7.8 yuan. How much are oranges per kilogram? 1 Yuan How many Jin of oranges can I buy (except two decimal places).
2 1, a batch of coal, burning 3.6 tons a day, can burn for 30 days, if burning 2.4 tons a day, how many days can it burn?
22, a football, 46. 7 to 5 to 2009/03/3 1. fair ...
Special training of application problems in fifth grade
average number
Class 1, Grade 5 is divided into three groups to throw basketball. The first group 10 people, * * * shot 28 times. The second group 1 1 person, * * * shot 33 times; The third group of 9 people, * * * to 23 times. How many balls did each class throw on average?
The following table is the statistics of basketball shooting in Class Two, Class Three, Grade Five. How many balls did each class throw on average? (The number shall be kept to one decimal place)
The number of people in each group is12110.
The average number of hits per person is 2.5 3 3.2.
When Xiao Liang was studying, he read an average of 6.25 pages a day for the first 4 days and 8 pages a day for the last 3 days. How many pages does Xiao Liang read every day this week?
Car A travels from place A to place B, with an average speed of 60 kilometers per hour in the first five hours and 56 kilometers per hour in the last three hours. How many kilometers does the car travel from a to b on average?
/kloc-two classes, Grade 0 and Grade 5, participated in the tree planting activities. There are 37 people in a class, and * * * planted 132 trees. Class two, 35 people, planting trees 120 plants. How many trees are planted in each class in grade five? How many trees does everyone plant in the fifth grade?
2. Sailing pioneers went out to sea to fish. Going out to sea in the first half of the month 13 days, * * * catching 805 tons; In the second half of the month, she went out to sea 14 days and fished 64 tons a day. How many tons of fish does this ship catch on average every day?
3. There are 22 boys in one class, with an average height of140.5cm; Girls 18, average height 142.5cm, what is the average height of the whole class?
4. There are 10 grandmothers in the nursing home, with an average age of 80.5 years; There are 12 grandfathers with an average age of 73.5 years. Find the average age of the elderly in the hospital. (Keep one decimal place)
Surface areas of cuboids and cubes
The rectangle is 4 meters long, 3 meters wide and 2.5 meters high. How many square meters is its surface area? (calculated in two ways)
A rectangular iron box, length 18cm, width 15cm and height 12cm. How many square centimeters of iron does it take to make this iron box?
How many square centimeters of cardboard do you need to make a rectangular carton with a length of 6 cm, a width of 5 cm and a height of 4 cm?
A rectangular wooden box, length1.2m, width 0.8m and height 0.6m.. How many square meters of planks does it take to make this wooden box? What if this wooden box is not covered properly?
The shape and size of a cuboid are shown in the figure below.
(1) What is the square decimeter of its upper and lower surfaces?
(2) What are the areas of its front and back?
(3) What is the area of its left and right sides?
A cubic wooden box without a lid, with a side length of 0.8 meters. How many square meters of boards do you need to make this wooden box?
A classroom is 8 meters long, 6 meters wide and 3.5 meters high. The walls and ceiling of the classroom need painting. The area of doors, windows and blackboards is 22 square meters, with an average of 0.25 kg of paint per square meter. How many kilograms of paint does it take to paint this classroom?
A cuboid (including cubes) consists of eight small cubes, and its length is 1 cm. Which one has the smallest surface area? What is the minimum surface area?
Volumes of cuboids and cubes
1, fill in the blanks.
The volume of the eraser is about 8 (), and the volume of the recorder is about 20 ().
The volume of cargo container is about 40 ()
2. Connection: The volume of the school platform is 24 cubic centimeters.
The volume of the schoolbag is 24 cubic meters.
The capacity of the carbon ink box is 24 cubic decimeters.
3. A rectangular steel plate is 2.2m long, 0.5m wide and 0.0 1m thick. How many cubic decimeters is its volume?
4. A cuboid bunker is 8 meters long, 4.2 meters wide and 0.6 meters deep, and the weight of sand per cubic meter is 1.75 tons. How many tons of sand does it take to fill this bunker?
5. Forging a cubic billet with a length of 6m into a rectangular steel piece with a width of 3m and a height of 2m. How long is this steel?
6. A cuboid iron block is 2.4m long,1.6m wide and 4m high. If the surface is coated with antirust paint, use 2.3 grams per square decimeter. * * * How many grams of antirust paint do you need?
7. Car fuel tank, 8 cm long, 5 cm wide and 4 cm high. How many liters of gasoline can this tank hold?
8. A rectangular water tank, measured from the inside, is 12 decimeter long, 6 decimeters wide and 5 decimeters deep. How many milliliters of water can this tank hold?
9. The fuel tank of the walking tractor is 3 decimeters long, 2.3 decimeters wide and 1.6 decimeters deep. How many liters of diesel can this tank hold? The weight of diesel oil per liter is 0.82 kg. How many kg of diesel oil is loaded? (Numbers are reserved as integers)
10. Fill in the actual figures in brackets.
A small bottle of mercuric chloride is () ml. A bottle of ink is () ml.
The volume of a car (or tractor) fuel tank is () liters.
1 1. Formula: (1) A rectangle is 3 decimeters long, 2 decimeters wide and 1 decimeter high. What is its surface area? What is the volume?
(2) The length, width and height of a cuboid are 6 decimeters. What is its surface area? What is the volume?
12. Guangming carton factory produces a cuboid carton, which is 8 decimeters long, 5 decimeters wide and 6 decimeters high.
(1) How many square decimeters of cardboard do you need to make a carton? (2) What is its volume?
13, calculate the surface area and volume of the cube.
Side length 4 cm 8 cm 16 cm
superficial area
roll
14, calculate the surface area and volume of the cuboid.
Length 3 decimeter 6 decimeter 12 decimeter
2 decimetres wide, 4 decimetres wide and 8 decimetres wide.
Height 1 decimeter 2 decimeter 4 decimeter
superficial area
roll
15. Fill in the appropriate unit of measurement in ().
(1) The surface area of the chalk box is about 6 (). (2) The volume of a matchbox is about 14 ().
(3) A swimming pool, which can accommodate up to 3,000 people ().
16, judging.
(1) Cubes with a side length of 6 decimeters have the same volume and surface area. ()
(2) A cube with a surface area of 6 square meters and a volume of 1 m3. ()
17, People's Leather Products Factory uses synthetic leather to make rectangular boxes, which are 0.9 meters long, 0.6 meters wide and 0.4 meters high. How much synthetic leather does it take to make a box?
18, Liming Carton Factory made 0.6m long cubic cartons. How much cardboard does it take to make a carton? What is the volume of this carton?
19, Yongfeng Water Pump Factory planned to manufacture 1575 pumps in 25 days, but actually manufactured 12 more pumps every day than originally planned. According to this calculation, how many days will it take to complete the original production task?
Factor and multiple
1. There are 320 apples, 240 oranges and 200 pears. How many copies of the same gift can you share with these fruits at most? How many apples, oranges and pears are there in each gift?
2. There are 27 boys and 8 girls in Class A of Yuxin Middle School. Let's go boating together (no more than 6 students per boat). Please calculate how many boats you should rent.
3. The school is rehearsing group calisthenics, and the team is required to be 12, 15, 18 and 24 lines, all of which can be rectangular. How many people do you need to attend the rehearsal of group calisthenics?
Significance and nature of fractions
A fraction, the denominator is 25 larger than the numerator, simplified. What was the original score?
A fraction is, if its numerator is reduced by 12, how much should the denominator be reduced to keep the size of this fraction unchanged?
A piece of cloth is used to make coats and trousers. How much is left?
1. The engineering team built a section of highway, kilometers on the first day, kilometers on the second day, and kilometers left. How many kilometers is this road?
2. The fifth-grade students collected more kilograms of scrap iron than the third-grade students. How many kilograms of scrap iron do these two grades collect?
A cargo ship sailed kilometers in the first hour, kilometers in the second hour and kilometers in the third hour. How many kilometers did the cargo ship sail in the third hour?
4. Build a canal. On the first day, the full length will be built, and on the second day, the full length will be built. How many parts of the whole length need to be repaired? 5 pairs 4 pairs 2009/04/0 1. Palade ...
Who can answer who is a genius 1 8/2009/04/02. Blues music
1. Master Zhang processed a batch of parts and completed 84 pieces in 4 days. According to this calculation, it will take another five days to finish processing these parts. How many parts are there in this batch?
2. There is a seeder with a working width of 2,2 meters, which is pulled by a tractor. According to the calculation of15km per hour, how many hectares can be sown per hour?
3. There is a triangular vegetable field with a base of 18m and a height of 6m. How many Chinese cabbages can be planted in this field?
4. A parallelogram glass with a bottom of 1.6m and a height of 0.9m The price of glass per square meter is 40 yuan. How much does it cost to buy this glass?
5. The barrage is trapezoidal in cross section, with a dam face width of 8m, a dam bottom width of 26.8m and a dam height of 6m. How many square meters is its cross-sectional area?
6. Xiaoming's family has a rectangular Gua Tian, which is 48 meters long and 20 meters wide. This summer, he collected 2400 kilograms of watermelon, how many kilograms of watermelon did he produce per square meter on average?
7. Trapezoidal wheat field, with an upper bottom of 76m, a lower bottom 120m and a height of 50m. A * * * harvests 8820 kilograms of wheat. How many kilograms of wheat does it average per square meter?
8. A parallelogram vegetable field with a base length of 48 meters and a height of 8 meters. What is the area of this parallelogram vegetable field?
9. A piece of red cloth is 30m long and1.5m wide. How many sides can you make with it as two right-angled pennants with 5-meter right-angled sides?
10. A piece of red cloth is 30m long and1.5m wide. As a right-angled pennant with two right-angled sides 5 meters long, how many sides can you make with it?
1 1. The parallelogram is 48m long and 30m high. Grow soybeans and corn. The area of soybean is twice that of corn. How many square meters have you planted?
Grade 5/Kloc-Class 0/2 (1) How many flags can be made with two pieces of colored paper with a length of 1 m and a width of 0.8 m, with right angles of 0.25 m and 0.2 m respectively?
13. The working width of the roller is1.8m, and it advances 60 meters per minute. How many square meters can this road roller/kloc-0 press per hour?
14 .. triangular vegetable field, base 16.4m, height 20m. If you can harvest 5 kilograms of carrots per square meter of vegetable field, how many kilograms of carrots can this vegetable field harvest? 15, each carton can hold at most 15 kg of apples, and there are 680 kg of apples picked in the orchard. How many cartons do you need?
16, a parallelogram vegetable field * * * receives 440 kg of vegetables. Its base is12.5m and its height is 5.5m.. How many Jin of vegetables do you collect per square meter on average?
17, turtle crane * * 100 with 350 feet. How many turtles and cranes are there?
18, chickens and rabbits in the same cage have 100 heads and 3 16 feet. How many chickens and rabbits are there?
19,30 coins, consisting of 2 cents and 5 cents, * * * worth 9.99 cents. How many coins are there in each?
20. There are 27 boxes of pens and pencils, a total of 300. There are 10 pens and 12 pencils in each box. How many boxes are there in each of these two pens?
2 1, Xiaohong bought 20 stamps with 50 cents and 80 cents at 13.60 yuan. How many stamps did she buy each?
22. Two trains, A and B, travel in opposite directions from two places 700 kilometers apart. The speed of train A is 85 kilometers per hour, and that of train B is 90 kilometers per hour. How many hours do the two trains meet?
23. Two trains leave from two stations facing each other at the same time. Car A travels at a speed of 48 kilometers per hour, and car B travels at a speed of 78 kilometers per hour. Two and a half hours later, two trains met. How long is the railway between the two stations?
24. Two trains, A and B, travel in opposite directions from two places 988 kilometers apart at the same time. 5.2 hours later, two trains met. The speed of train A is 93 kilometers per hour, and that of train B is how many kilometers per hour?
25. Trapezoidal flower bed, with an upper bottom of 5m, a lower bottom of 5m and a height of 4m. If an average of 60 flowers are produced per square meter, how many flowers can this garden produce?
26. There are two kinds of boats, big ones and small ones. The big boat can take six people, and the small boat can take four people. Class 1, Grade 5, 46 teachers and students, just distributed on the ship 10, without any surplus. How many boats and boats are there?
27. The area of a trapezoid is 12.56 square meters, the upper bottom is 1.02 meters, and the height is 3. 14 meters. How long is the base of this trapezoid?
28. The railway from Tianjin to Jinan is 357 kilometers long. An express train leaves from Tianjin and a local train leaves from Jinan. After meeting for three hours, the average speed of the express train is 79 kilometers per hour, and the average speed of the local train is how many kilometers per hour?
29. Read extracurricular books with a smile. Those who read the whole book on the first day, the whole book on the second day and the whole book on the third day, how many points are left after three days?
30. Xiaohua's room is 5. 1 m long and 3 meters wide. If half is paved with square floor tiles with a side length of 30 cm, how many pieces are needed?
3 1. Zhang Gang bought 20 postcards with 13.6 yuan. How many 6-corner and 8-corner postcards are there
32. Two engineering teams, Team A and Team B, built a road with a length of 1 1,400 meters. They started construction at both ends at the same time. Team A builds 80 meters every day, while Team B builds 60 meters every day. How many days will it take to complete this road?
33. The distance from Huainan to Wuhu is 240 kilometers. At 6: 30 every morning, the bus from Huainan leaves for Wuhu at a speed of 58 kilometers per hour, and the bus from Wuhu leaves for Huainan at a speed of 62 kilometers per hour. When did the two cars meet on the road?
34. There are 2 10 color TV sets in this shop, which is three times more than black and white TV sets. How many black and white TV sets are there in this shop?
35. Use a wire with a length of 12.4 decimeter to form an isosceles trapezoid. It is known that the two waists of this trapezoid are 6.4 decimeters long and the area is 9 square decimeters. What is the height of this trapezoid?
There are several geese and ducks in the river, among which the number of ducks is four times that of geese. It is also known that there are 27 geese in Abby Mallard. How many are there in each goose and duck?
37. A forest farm should plant 2,000 trees, with an average of 350 trees per day in the first three days. The rest are required to be planted in two days. How many trees should be planted on average every day?
38. The distance between A and B is 480 kilometers. A car travels from A to B at a speed of 60km/h and returns at a speed of 40km/h.. What is the average speed of this car back and forth?
39. The road team built a section of road. The road150m was repaired every day in the first 8 days, and the remaining 3000m was repaired in 4 days. How many meters does this road team build roads every day on average?
40. This clothing factory used to make a 2.5-meter cloth. After adopting the new cutting method, each suit saves 0.5 meters. How many sets of cloth can the original 60 sets of clothes make?
4 1. The engineering team built a 54-kilometer-long highway, and 6.3 kilometers were built in the first seven days. At this rate, how many days will it take to finish the rest?
42. The distance between A and B is 480 kilometers. Two cars, A and B, start from A and B at the same time and drive in opposite directions. Six hours of meeting, car A is 45 kilometers per hour, and car B is how many kilometers per hour?
43. Students in two classes of Grade Five collect tree species, with 45 students in one class, each collecting 0. 13kg. 2 * * * class income 6. 15 kg. How much do you charge for two shifts of one * * *?
44. The classroom should be paved with square bricks. It needs 270 square bricks with an area of 0. 16 square meters. How many pieces do you need if you replace it with a square brick with a side length of 0.3 meters?
The engineering team will build a 4.8-kilometer canal, which is scheduled to be completed in 15 days. In fact, 0.08 km more than originally planned is repaired every day. How many days did it actually take you to finish the task?
46. Students in two classes of Grade Six collect tree species. There are 45 people in class one, and each person receives 0. 13kg, and 6. 15kg for 36 people in class two. How many kilograms of tree species did Class One collect?
47. Four giant pandas ate169.6438+02kg of bamboo leaves in two weeks. How many kilograms of bamboo leaves does each giant panda eat every day?
48. Clothing factories produce school uniforms. Now every 2 meters of cloth is used, which is 0.2 meters less than the original. How many sets of cloth can 880 school uniforms make now?
49. A barrel with a barrel weighs 9.2 kilograms. Half poured, and the barrel weighs 5.6 kilograms. How much does this bucket weigh?
Xiaoming's new room will be tiled. If you use a square brick with an area of 0.09 square meters, you need 160. If you use a square brick with a side length of 0.4 decimeter, how many pieces do you need?
5 1. A steel mill planned to produce 54,000 tons of steel throughout the year, and the task was completed two months ahead of schedule. How many tons is the actual monthly output more than planned?
52. The school bought four desks and nine chairs for 89 1 yuan. It is known that the desk of 1 costs the same as six chairs. How much is each chair and table?
The distance between the two cities is 280 kilometers. Two cars leave two cities at the same time and meet in 3.5 hours. It is known that one car travels 38 kilometers per hour, and how many kilometers does another car travel per hour?
54. In Li Shifu, in May, Li Shifu planned to produce 1800 pieces per day, but actually produced 15 pieces per day.
55, a canal, originally planned to repair 0.45 km per day, completed in 30 days, the actual daily work efficiency is 1.2 times of the original plan. How many days does it actually take to complete this task?
56. A farm tool factory produces 2,500 small farm tools. In the first five days, it produces 180 pieces every day, and the rest will be completed in eight days. How many farm tools should be produced every day?
57. The school canteen returned 26 bags of flour, 20 kilograms each, and the weight of returned rice was 80 kilograms less than twice the weight of flour. How many kilograms of rice are shipped back?
58. A construction site needs 47 tons of sand, which was transported six times by a 4.5-ton truck and the rest by a 2.5-ton truck. How many times will it be transported?
59. Trapezoidal orchard has a bottom of 240m, an upper bottom 180m and a height of 60m. If each fruit tree covers 9 square meters, how many fruit trees are there in this orchard?
60. A bus and a truck set off from two cities, A and B, and met for four hours. It is known that the speed of the bus is 90 kilometers per hour, which is 1.5 times that of the truck. What is the distance between the two cities?
1, 6.25 yuan for a math book and 5.86 yuan for a Chinese book. Two books and one * * *, how much is it?
2. A watermelon weighs 4.86 kg and a cantaloupe weighs 3.5 kg. How many kilograms is a watermelon heavier than a cantaloupe?
One-step multiplication and division of two decimal places 1 a kind of wool is 48.36 yuan per kilogram. How much is 3 kilos? Buy 0.6 kg?
2. A professional sericulture group raises 2 1 spring silkworm and one * * * produces1.24kg cocoon. How many kilograms of cocoons are produced per piece on average?
Three, three two-step calculation application problems with known conditions 1, Xiaohong read a story book for five days, reading 12 pages every day, but didn't read 38 pages. How many pages are there in this book? (Draw a line segment)
3 bags of flour and 3 bags of rice in the canteen. Flour is 25 kg per bag and rice is 50 kg per bag. How many kilograms of flour and rice are shipped?