2. A garment factory produced 4,500 sets of sportswear in February, which was less than 5,438+10% in June. How many sets of sportswear were produced in June+10, 5438?
3. 10 hectare of wheat field, with an average harvest of 4.8 tons of wheat per hectare. How many tons of flour can these wheat grind according to the flour yield of 85%? The wall of this clean room should be painted. This room is 4 meters long, 3 meters wide and 3 meters high. Excluding the door and window area of 4.7 square meters, 0.6 liters of paint is used per square meter, and 4.5 liters of matte paint is used for the external wall of Nippon Mengqiancai, with a price of 286 yuan per barrel. How much does it cost to paint a well-painted room?
There are 49 students in one class, including 24 boys. What percentage of boys are in this class? What percentage of girls are in the class?
6. A 30-meter-long steel pipe was sawed into three sections. The first section is 7 meters long and 2.5 meters shorter than the second section. How long is the third section?
7. There is a swimming pool, which is 25m long,12m wide and1.4m deep. Square white tiles with a length of 2 meters are attached to the bottom and edge of the pool. A * * *, how many pieces do you need?
8. An engineering team built a highway with a length of 15.8km, the first perimeter was 5km, and the second week was 0.7km more than the first week. How many kilometers will it take to complete?
9. This cuboid reservoir has 2 100 cubic meters of water. This reservoir is 50 meters long and 20 meters wide. How deep is it?
10. The school brought 7.6 cubic meters of sand and spread it in a bunker 5 meters long and 3.8 meters wide. How thick can it be laid?
1 1. A water conservancy engineering team repairs ditches every day for the first four days 125m, and repairs ditches every day for the last three days 134m. How many meters of canals does this engineering team build on average every day?
12. How long does it take to make 10 cubic iron frame with a side length of 8 cm?
13. Make an iron box with iron sheet so that its length, width and height are 1.8 decimeter, 1.5 decimeter and 1.2 decimeter respectively. How many square meters does it take to make such an iron box?
14. How many square meters of glass does it take to make a cubic glass fish tank without a cover? The side length is 3 meters.
15. Our school will paint the classroom, which is 8 meters long, 7 meters wide and 3 meters high. After deducting the area of doors, windows and blackboards, we know that every square meter needs 5 yuan painting fee. How much does it cost to paint a classroom?
16. A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark?
17. Make drawers with the length, width and height of 2.8 decimeters, 1.5 decimeters and 2.2 decimeters respectively. How many square meters of wood does it take to make five such drawers?
18. There is a fish pond, which is 18 m long, 12 m wide and 3.5 m deep. It is necessary to coat a layer of cement around the fish pond to prevent water seepage. How many kilograms of cement do you need if you use 5 kilograms of cement per square meter?
19. The processing factory will process a batch of TV sets. (No bottom) Each TV is 60 cm long, 50 cm wide and 55 cm high. How many square meters of cloth does it take to make 1000 sets?
20.24 rectangular iron chimneys, each 2m long, 4m wide and 3m high. How many square meters of iron do you need?
2 1. A rectangular goldfish bowl, 8 centimetres long, 5 centimetres wide and 6 centimetres high, accidentally broke the glass in front of it. When repairing the glass, how many square decimeters is the area of the glass?
22. The rectangle is 4 decimeters long, 2.5 decimeters wide and 3 decimeters high. How many cubic decimeters is its volume?
23. A cuboid bunker is 4m long, 2m wide and 0.5m deep. If the yellow sand weighs 1.4 tons per cubic meter, how many tons does it weigh?
24. There is a rectangular steel with a length of 2 meters, a square cross section and a side length of 5 cm. Each cubic decimeter of steel weighs 7.8 kilograms. How much does this square steel weigh?
25. What is the volume of a cuboid with a bottom area of 30 square decimeters and a height of 3 meters?
26. Writing director 1.3m, 0.6m wide and 0.8m high. How much space does 20 such desks need?
27. A 5-meter-long cube fish tank is filled with water. Pour water into a cuboid fish tank with a bottom area of 48 square decimeters and a height of 6 decimeters. How deep is the water in the fish tank?
28. An 8-meter-long cubic tank can hold 490 liters of water. Pour water into a cuboid water tank with a length of 10 decimeter, a width of 7 decimeters and a height of 8 decimeters. What is the depth of the water tank?
29. Forge an 8 cm long cubic billet into a rectangular steel plate with a length of 16 cm and a width of 5 cm. How thick is this steel plate? (excluding losses)
30. A cuboid oil drum with a bottom area of 18 square decimeter can hold 43.2 kilograms of oil. If each liter of oil weighs 0.8 kg, what is the height of oil in the oil drum?
3 1. Rectangular iron sheet is 30 cm long and 25 cm wide. Cut a square with a length of 5cm from each of the four corners to make a box without a lid. How much iron is used in this box? What is its volume?
32. Take a rectangular wooden board with a length of 26dm, cut a square with a bottom length of 3 m at four corners, and make a cuboid container with a volume of 840 cubic decimeter. What is the original width of this board?
A rectangular swimming pool is 60 meters long, 30 meters wide and 2 meters deep. How many square meters is this swimming pool? Draw the water level line with red paint along the inner wall of the swimming pool at 1.5 meters. How long is this line? Now the water in the swimming pool just reaches the water level. What's the volume of water in the pool?
34. A rectangular glass jar, measured from the inside, is 40 cm long, 25 cm wide and 12 cm deep. After a stone is immersed in water, the water surface rises to 16 cm. Find the volume of the stone?
35.80 square logs are piled into a cuboid with a length of 2m, a width of 2m and a height of1.5m. What is the average volume of each square log? How many cubic decimeters?
36.3 cubes with a side length of 8 cm are combined into a cuboid. What is its volume and surface area?
37. The furniture factory ordered 500 square logs, each with a cross-sectional area of 25 square decimeters and a length of 3.8 meters. What is the volume of these logs?
38. Put two cubes with a side length of 1.5 decimeter into a cuboid. What is the volume and surface area of this cuboid?
39. The surface area of a cuboid is 156 square decimeter, the bottom area is 30 square decimeter, and the perimeter of the bottom surface is 32 decimeter. What is the volume of this cuboid?
40. How many cuboid blocks with a length of 8cm, a width of 12cm and a height of 5cm can be sawed into cubes with a length of 2cm?
4 1. A rectangular piece of wood with a square bottom is 5 meters long. Cut into four sections and increase the surface area by 36 square meters. What is the volume of this cuboid?
42. In the fifth grade, there are 23 boys and 25 girls. What is the percentage of girls to boys? What is the percentage of boys and girls in this class?
43. Divide 3 tons of rice into 5 parts on average. How many tons per serving? How much is the rice per serving?
44. The school library has 280 comic books and 140 literature books. How many comic books are there? Which part of a comic book is a literature book?
45. In Class 3, Grade 5, Shengli Primary School, 24 students met the physical education standards, and 12 students failed to meet the standards. What percentage of students in this class have reached the standard?
46. Master Wang processes 34 parts in 6 hours, and Li Shifu processes 40 parts in 7 hours. Who works efficiently?
47. A book has 185 pages. After reading 95 pages, what percentage of this book have you read? What percentage of unread pages are in this book?
48. A cuboid reservoir is 8m long, 5m wide and 3m deep. What is the area of this reservoir? How many cubic meters of water can it hold at most?
49 .. Xiaoming's father made a cube fish tank with a length of 6dm out of glass. How many square meters of glass does it take to make this fish tank? Xiaoming injected 144l water into the fish tank. What is the height of the water?
50. Last year, the Machine Tool Plant completed the annual tasks of 1/6, 1/5, 4/ 15 and 7/ 10 respectively. How much more than last year's annual plan?
5 1. A batch of steel was sent from the construction site, including 2 tons of round steel, 2/5 tons of square steel and 7 tons of other steel. How many tons of steel are there?
52. Find a two-digit number, exchange the ten digits with the number on the one digit, and the two digits are still prime numbers. Write two such two-digit numbers.
53. Students from Class 5, Grade 5 come into life and queue up to perform. There are 65,438+02 people or 65,438+06 people in each row. It is understood that there are less than 50 students in this class. Can you figure out how many students there are in this class?
There are 44 students in Class One, Grade Six, and 2/ 1 1 of all the students take part in the chorus. How many people are there in the chorus?
A duck weighs 3 kilograms, and the weight of a chicken is 2/3 of that of a duck. How much does this chicken weigh?
56. A volleyball is priced in 60 yuan, and the price of basketball is 5/6 of that of volleyball. What is the price of basketball?
57.4 There is 18 yuan in Xiao Liang's savings box, and Xiaohua's savings is 5/6 that of Xiao Liang. Xiao Xin's savings are two-thirds of Xiaohua's. How much did Xiao Xin save?
58. Xiaohong has 36 stamps, and the stamps in Xiao Xin are six fifths of Xiaohong's. Xiaoming's stamps are three-quarters of those of Xiao Xin. How many stamps does Xiaoming have?
59. The incubation period of geese is 30 days, ducks are1415, and chickens are 3/4 of that of ducks. How many days is the incubation period of chicken?
60.7. Three students jump rope. Xiao Ming jumped 120 times, Xiao Qiang jumped 5/8 of Xiao Ming's and Liang Xiao jumped 2/3 of Xiao Qiang's. How many times did Xiao Liang jump?
6 1.8, Grade 6 students collected 180 cans, of which 1/3 was collected by Class 1 and 2/5 by Class 2. How much does each class charge/
62.9, long-distance running exercise, Xiao Xiong ran 3 kilometers, Xiao Xiong ran 5/6 equals Xiao Gang. Xiao Yong is five quarters of Xiao Xiong. How many kilometers did Xiao Gang and Xiao Yong run?
63. 10, Xiaohong weighs 42kg, Xiaoyun weighs 40kg, and Xiao Xin's weight is equivalent to 1/2 of the total weight of Xiaohong and Xiaoyun. How much does Xiao Xin weigh
64. 1 1, the sixth grade students help the library to make up books. Class one has repaired 54 books, class two has repaired 5/6 of class one, and class three has repaired 4/3 of class two. How many repair books are there in Class Three?
65. A bucket of water is 3/4, 15 kg. How much does this bucket of water weigh?
Wang Xin bought a book and a pen. The price of the book is 4 yuan, which is exactly 2/5 of the price of the book. What is the price of a pen?
67. Maximum speed of car 140 km. 115 equivalent to the speed of supersonic aircraft. How many kilometers does this supersonic plane fly per hour?
68. There is an orchard of 4 hectares. Apple trees account for three quarters of the orchard area. How many hectares does this apple tree cover?
69. The school has a 3-hectare apple tree. It accounts for 3/4 of the total orchard area. What is the total area of this orchard?
70. Xiaoli has more color pictures than Xiaolan 12, which is exactly 3/ 10 of Xiaolan's pictures. How many color pictures does Xiaolan have? How many sheets does Xiaoli have?
7 1. A shampoo, large bottle 450g, small bottle 125g. How many times is the big bottle bigger than the small one? What is the score of a big bottle in a small bottle?
72. There are11students in the sixth grade, which is equivalent to 3/4 of the students in the fifth grade. How many people are there in the fifth and sixth grades?
73. Xiaogang's family bought a bag of flour and ate 15 kg, which is exactly 3/4 of this bag of flour. How many kilograms is left in this bag of flour?
75. The store delivered 25 packages of red sweaters and 15 packages of blue sweaters. What is the packing quantity of blue sweater?
76. The store sent 25 packages of red sweaters, and the number of packages of blue sweaters was 3/5 of that of red sweaters. How many blue sweaters did the shop send?
77. The store delivered 15 packages of blue sweaters, which is exactly 3/5 packages of red sweaters. How many packages of red sweaters did the shop send?
There are 45 students in Class One, Grade Six, of whom 20 are girls. What percentage of girls are in the class?
There are 45 students in Class One, Grade Six, nine quarters of whom are girls. How many girls are there?
There are 25 boys in Class One, Grade Six, accounting for 5/9 of the class. How many students are there in the class?
8 1. The car travels 40 kilometers per hour, and the flying speed of the swallow is 15/4 times that of the car. How many kilometers do swallows fly per hour?
82. There are 30 people in bright primary school Art Group, biology group 1/3, and model airplane group 4/5. How many people are there in the model airplane group?
83. The number of the model airplane group in bright primary school is 4/5 of that in the biology group,13 in the art group and 8 in the model airplane group. How many people are there in the art group?
84. There are 2400 geese on a farm. The number of geese is 3/4 of that of ducks and 4/5 of that of chickens. How many chickens are raised on the farm?
85. There are 50 fifth-grade students in a primary school, and one day they are absent from class 1 person. What's the attendance rate on this day?
86. A class planted 128 trees for five years, of which 32 trees did not survive. What percentage of trees are alive?
87. 128 trees are planted every five years, of which 32 trees do not survive. What is the survival rate?
88. There are 45 students in Grade 6, 2/5 of whom passed the final long jump exam. How many students passed?
89. There are 45 students in grade six, and 80% of them passed the long jump exam at the end of last semester. How many students passed?
There are 50 students in Xiaoming's class, 60% of whom are girls. How many are girls?
90. A naughty family of five, 40% of whom are women. How many are women?
Surface area calculation
9 1. How long does it take to make 10 cubic iron frame with a side length of 8 cm?
92. Make an iron box with iron sheet so that its length, width and height are 1.8 decimeter, 1.5 decimeter and 1.2 decimeter respectively. How many square meters does it take to make such an iron box?
93. How many square meters of glass does it take to make a 3-minute uncovered cube glass fish tank?
94. Our school will paint the classroom, which is 8 meters long, 7 meters wide and 3 meters high. After deducting the area of doors, windows and blackboards, it is known that 5 yuan painting costs per square meter. How much does it cost to paint a classroom?
95. A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark?
96. The length, width and height of woodcut are 2.8 decimeters, 1.5 decimeters and 2.2 decimeters respectively. How many square meters of wood carving does it take to make five such drawers?
97. There is a fish pond with a length of 18m, a width of 12m and a depth of 3.5m Cement should be coated around the fish pond to prevent water seepage. If 5 kilograms of cement is used per square meter, how many kilograms of cement does a * * need?
98. The processing factory will process a batch of TV sets. (No bottom) Each TV is 60 cm long, 50 cm wide and 55 cm high. How many square meters of cloth does it take to make 1000 sets?
99.24 rectangular iron chimneys, each 2m long, 4m wide and 3m high, how many square meters of iron do you need?
100. A rectangular goldfish bowl, 8 centimetres long, 5 centimetres wide and 6 centimetres high, accidentally broke the front glass. What is the area of the glass when it is repaired?