1, a rectangular glass jar, 4 decimeters long, 3 decimeters wide and 5 decimeters high. After pouring, the water depth is 3.5 decimeters. How many liters of water do you pour? 2. Schools should paint classrooms. It is known that the length, width and height of the classroom are 10m, 8m and 3m respectively, and the area excluding doors and windows is12.5m. If it costs 5 yuan per square meter to paint, how much will it cost to paint this classroom? 3. The rectangular biscuit box is 12cm long, 8cm wide and 14cm high. If you want to put a circle of trademark paper around (not up and down), what is the minimum area of this trademark paper? 4. Dig a rectangular pit with a length of 60m, a width of 40m and a depth of 50cm at the construction site. How many square meters of soil will be dug? 5. The park should build a fence with a length of 15m, a thickness of 24cm and a height of 3m with cube bricks with a length of 3dm. How many bricks does this fence need? 6. A train car, measured from the inside, has a length of 13m, a width of 2.7m, a coal height of 1.5m and a coal weight of 1.33t per cubic meter. How many tons of coal is there in this train car? 7. Forging a cuboid iron block with a 4dm long cuboid iron block. The cross-sectional area of this cuboid is 0.2 square decimeter. What's its length? 8. The supermarket should install an angle iron on both sides of a glass cabinet 3 meters long, 0.6 meters wide and 0.8 meters high. * * * How many meters of angle iron do you need? A rectangular swimming pool is 50 meters long, twice as wide and 2.5 meters deep. Now, how many square meters of tiles do you need to put on the periphery and bottom of the swimming pool? 10, an irregular stone completely invaded a rectangular water tank with a bottom area of 280 square centimeters, and the water level rose by 2 centimeters. What is the volume of this stone? 1 1, the sum of the sides of a cuboid and a cube is equal. It is known that the length of a cuboid is 10 cm, the width is 8 cm and the height is 6 cm. What is the side length and surface area of a cube? What is the volume? 12. The car fuel tank is 3.5 decimeters long, 2.5 decimeters wide and 3 decimeters high. How many square decimetres of iron do you need to make this fuel tank? If 1 liter of gasoline weighs 0.8kg, how many kilograms of gasoline can this tank hold? 13. Melt a cubic iron block with a side length of 8 decimeters to become a cuboid iron block with a bottom area of 32 square decimeters. What's the height in decimeters? 14. A rectangular water tank, 50 cm long, 30 cm wide and 34 cm deep. Now a metal part is immersed in water. At this time, the water depth of the water tank is 40 cm. What is the volume of this part? 15, a rectangular glass container, measure the length and width of 2dm from the inside, pour 5.5L of water into the container, and then put an apple into the water. At this time, the water depth in the container is15cm. How big is this apple? 16. A fence with a length of 15m, a thickness of 24cm and a height of 3m will be built in the south of the park. If 525 bricks are used per cubic meter, how many bricks are used in this fence? 17. The furniture factory ordered 500 square logs, each with a cross-sectional area of 24 square decimeters and a length of 3 meters. How many cubic meters is this wood? 18, rectangular glass fiber reinforced plastic, 8 dm long, 6 dm wide, 4 dm high and 2.8 dm deep. How many liters of water will the water tank overflow if a 4 dm long cubic iron block is put in? 19. The newly-built basketball stadium should be paved with a 3 cm thick wooden floor. It is known that the stadium is 36 m long and 20 m wide. How many cubic meters of wood should be paved? 20. There is a rectangular piece of paper, 70 cm long and 50 cm wide. If you want to cut into several squares of the same size, without any surplus, what is the maximum side length of the cut small square? 2 1. A team has 48 boys and 36 girls. Now boys and girls line up separately. How many people in each row can make the number the same? How many rows are there for boys and girls at this time? 22. Water the roses every four days and Clivia every six days. Aunt watered the roses and Clivia at the same time today. In a few days, she will water two flowers at the same time. The starting points of the 23 rd and 3 rd roads are the same as those of the 5 th road. The 3 rd road runs every 6 minutes and the 5 th road runs every 8 minutes. After the two cars start at the same time, how many minutes will it take at least before the two cars start at the same time for the second time? 24. A square towel can be made into a square towel with a side length of 8 cm or a square towel with a side length of 10 cm, and there is no redundancy. How many centimeters is the side length of this square cloth at least? It takes Xiaolin 25 minutes to go home from school, and Xiaohong 15 minutes to go home from school. If they walk at the same speed, who is farther from school? 1, (1) ring-shaped iron sheet, with an outer circle radius of 7 cm and an inner circle radius of 0.5 decimeter. What is the area of this ring? (2) The rectangle is 8 cm long and 4.56 cm wide. What is the area of a circle with the same circumference as this rectangle? 2. The school held a singing contest, which won several first, second and third prizes. Results Three fifths of the total winners won the first and second prizes, and nine tenths won the second and third prizes. What percentage of the total number of winners won the second prize? 3. A fraction is 1 after adding one of its decimal units and 0.875 after subtracting one of its decimal units. What is the score? 4. A glass of juice, Xiao Ming drank 1/3, then filled it with water, drank half of it, filled it with water, drank 1/4, and continued to fill it with water. Finally, he drank the diluted juice in one gulp. How much juice and water did Xiaoming drink? 5. A rope is 3 1.4m long. Which is bigger, enclosing a rectangle or a square or a circle? (Discuss in groups and discuss the size of the area) 6. (1) The circumference of a piece of semi-circular paper is 10.28 decimeter. How many square decimetres is its area? (2) The perimeter of a semicircular flower bed is102.8m. What is its area? 7. If a pile of goods is 14 tons, how many times will it be transported by a truck with a load of 4 tons? 1. How long does it take to make 10 8 cm long cubic iron frames? 2. 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? 3. How many square meters of glass does it take to make a 3-minute uncovered cube glass fish tank? 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? A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark? 6. 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? 7. There is a fish pond, with a length of 18m, a width of 12m and a depth of 3.5m It is necessary to coat a layer of cement around the fish pond to prevent water seepage. If 5 kilograms of cement slurry is used per square meter, how many kilograms of cement does a * * need? 8. 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? 9.24 rectangular iron chimneys, each 2m long, 4m wide and 3m high. How many square meters of iron do you need? 10, rectangular goldfish bowl, 8 cm long, 5 cm wide and 6 cm high. I accidentally broke the front glass, and the matching glass area during maintenance was () 1. The length, width and height of a cuboid are 4 decimeters, so how many cubic decimeters is its volume? 2. 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? 3. There is a rectangular steel with a length of 2m and a cross section of 5cm. Each cubic decimeter of steel weighs 7.8 kilograms. How much does this square steel weigh? 4. What is the volume of a cuboid with a base area of 30 square decimeters and a height of 3 meters in cubic decimeters? 5. Writing head 1.3m, 0.6m wide and 0.8m high. How much space does 20 such desks need? 6. A 5-meter-long cube fish tank is filled with water. Pour water into a rectangular 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? 7. A cubic water tank with a side length of 8 decimeters 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? 8. Forging a cubic blank with a length of 8 cm 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) 9. 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? 10, a rectangular iron sheet, 30cm long and 25cm 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? 1 1. Cut a rectangular wooden board with a length of 26dm, and cut squares with a bottom length of 3 m at four corners to make a cuboid container with a volume of 840 cubic decimeters. What was the initial width of this board? 12. A rectangular swimming pool is 60m long, 30m wide and 2m 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? 13. 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? Volume and surface area: 1.80 square, stacked 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? How many cubic decimeters? 2. What is the volume and surface area of three cubes with a side length of 8 cm, which are combined into a cuboid? 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? 4. Put two cubes with side length of 1.5 decimeter into a cuboid. What is the volume and surface area of this cuboid? 5. 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? 6. 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? 7. A rectangular piece of wood with a square bottom is 5 meters long. Cut into 4 sections to increase the surface area by 36 square meters. What is the volume of this cuboid? Fractional application problem 1. , 12 candy, evenly distributed to 3 people, how much is each? 2, 12 candy, distributed to three people on average, how many of these sweets does each person get? Five apples are distributed to eight people equally. How many apples does everyone have? How many apples can everyone get? 4. 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? 6. Divide 3 tons of rice into 5 parts on average. How many tons per serving? How much is the rice per serving? 7. There are 280 comic books and 140 literature books in the school library. How many comic books are there? Which part of a comic book is a literature book? 8. The number of students in Class 3, Grade 5 in Shengli Primary School who reached the standard was 24, and the number of students who failed to meet the standard was 12. What percentage of students in this class have reached the standard? 9. Master Wang processes 34 parts in 6 hours, and Li Shifu processes 40 parts in 7 hours. Who is more efficient? 10. 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? 1 1. There are 25 sika deer and 5 giraffes in the zoo. How many times are sika deer more than giraffes? How many giraffes are there more than sika deer? 12. There is a piece of wood. Cut off 2/5 meters for the first time and 7/ 10 meters for the second time, leaving 4/ 15 meters. How long is this piece of wood? 12. Some fruit trees are planted in the orchard, among which litchi trees account for 12/27, longan trees account for 12/25, and the rest are Myrica rubra. What percentage of Myrica rubra accounts for the total? 13. Mom bought 600g of oil, and used 1/3 on the first day and 1/4 on the second day. How much oil is left? Comprehensive exercise 1. M: Students in our class 1/4 joined the choir. Language: 2/8 students in our class participated in the model airplane group. Female: Eight students in our class took part in the sports group. There are 40 students in this class. Which group has fewer students? What are the numbers of the other two groups? 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? 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? 5. In the last four quarters, Machine Tool Plant has completed the annual tasks of 1/6, 1/5, 4/ 15 and 7/ 10 respectively. How many points did you exceed last year's annual plan? 6. A batch of steel was sent from the construction site, including 2 tons of round steel, 2/5 tons of square steel and other steel 1/7 tons. How many tons of steel are there? 7. Find a two-digit number, and exchange the numbers on the ten-digit number and the one-digit number, and the two-digit number is still a prime number. Write two such two-digit numbers. 8. Students from Class 5, Grade 5 walked into life and lined up to perform. 12 people or 16 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? Let go. That's it. I'm exhausted. Supplement: I just answered QQ 2410218181.

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