1. how long does it take to make 1 cubic iron frames with edges of 8 cm?

2. Make an iron box with iron sheet so that its length, width and height are 1.8 decimeters, 1.5 decimeters and 1.2 decimeters respectively. How many square meters does it take to make such an iron box?

3. How many square meters of glass do you need to make an uncovered cube glass fish tank? The edge length is 3 meters.

4. Our school needs to paint the classroom, which is 8m long, 7m wide and 3.5m high. After deducting the area of doors, windows and blackboards of 13.8m, it is known that 5 yuan painting fee is required for each m2. How much does it cost to paint a classroom?

5. A commodity box is a cube with a side length of 6 cm. What is the largest area of the box with a trademark?

6. The length, width and height of wood blocks are 2.8 decimeters, 1.5 decimeters and 2.2 decimeters respectively. How many square meters should wood blocks be used to make five such drawers?

7. There is a fish pond with a length of 18 meters, a width of 12 meters and a depth of 3.5 meters. It is necessary to apply a layer of cement on all sides of the fish pond to prevent water seepage. If 5 kilograms of cement is used per square meter, how many kilograms of cement does a fish pond need?

8. The processing factory has to process a batch of TV sets. (There is no bottom) Each TV set is 6 cm long, 5 cm wide and 55 cm high. How many square meters of cloth should be used to make 1 sets?

9. how many square meters of iron should be used to make 24 rectangular iron chimneys, each of which is 2m long, 4m wide and 3m high?

1. A rectangular goldfish bowl is 8 decimeters long, 5 decimeters wide and 6 decimeters high. The glass in front of it was accidentally broken, and the area of the glass matched during repair was ()

Volume calculation

1. The length, width and height of a rectangular box are 4 decimeters, and the volume is 3 decimeters.

2. A cuboid bunker is 4 meters long, 2 meters wide and .5 meters deep. If the yellow sand weighs 1.4 tons per cubic meter, how many tons does it weigh?

3. There is a rectangular steel, which is 2 meters long and the cross section is a square with a side length of 5 centimeters. The weight of steel per cubic decimeter is 7.8 kilograms. How many kilograms does this square steel weigh?

4. A cuboid with a bottom area of 3 square decimeters and a height of 3 meters, how many cubic decimeters is its volume?

5. A writing desk is 1.3m long, .6m wide and .8m high. How much space does it take to have 2 such writing desks?

6. A cube fish tank with a side length of 5 decimeters is filled with water. Pour the 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?

7. A cube tank with a length of 8 decimeters contains 49 liters of water. Pour the water into a cuboid tank with a length of 1 decimeters, a width of 7 decimeters and a height of 8 decimeters. What is the water depth in the tank?

8. Forging a cube billet 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? (Loss excluded)

9. A cuboid oil drum with a bottom area of 18 square decimeters can hold 43.2 kilograms of oil. If each liter of oil weighs .8 kilograms, what is the oil height in the oil drum?

1. A rectangular iron sheet is 3cm long and 25cm wide. Cut a square with a length of 5cm from each of the four corners and make it into a box without a cover. How much iron sheet is used in this box? What is its volume?

11. Cut a rectangular wooden board with a length of 26dm, and cut off squares with a side length of 3 m at four corners, and make it into a cuboid container with a volume of 84 cubic decimeters. What was the original width of this wooden board?

12. A rectangular swimming pool is 6 meters long, 3 meters wide and 2 meters deep. How many square meters does the swimming pool cover? Draw a water level line with red paint 1.5 meters along the inner wall of the swimming pool. What is the length of this line? Now the water in the swimming pool just reaches the water level line. How about the volume of water in the pool?

13. A cuboid glass jar, measured from the inside, is 4 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?

comprehensive exercise of volume and surface area

1. 8 squares are stacked into a cuboid 2 meters long, 2 meters wide and 1.5 meters high. What is the average volume of each square? How many cubic decimeters?

2. What are the volume and surface area of three cubes with 8 cm sides, which make up a cuboid?

3. The furniture factory ordered 5 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. what are the volume and surface area of two cube blocks with a side length of 1.5 decimeters?

5. The surface area of a cuboid is 156 square decimeters, the bottom area is 3 square decimeters, and the perimeter of the bottom surface is 32 decimeters. What is the volume of the cuboid?

6. how many cuboid blocks with a length of 8 cm, a width of 12 cm and a height of 5 cm can be sawed into cubes with a length of 2 cm?

7. A cuboid wood with a square bottom is 5 meters long. Cut it into four sections, and the surface area is increased by 36 square meters. What is the volume of the cuboid?

Fractional application problem

1. Twelve sweets, distributed to three people on average, how many each?

2, 12 sweets, distributed to 3 people on average, how much of these sweets does each person get?

3. Five apples are distributed to eight people on average. How many apples does each person get? How much of these apples does everyone get?

There are 23 boys and 25 girls in Grade 4 and Grade 5. What percentage of boys are girls? What percentage of the class are boys and girls?

6. Divide 3 tons of rice into 5 portions on average. How many tons is each portion? How much is each serving of rice?

7. There are 28 comic books and 14 literary books in the school library. How many times are there comic books? What part of a comic book is a literary book?

8. There are 24 students in Class 3, Grade 5 in Shengli Primary School who meet the physical education standards, and 12 students who fail to meet the standards. What percentage of the students who meet the standards account for the whole class?

9. Master Wang processes 34 parts in 6 hours, while Master Li processes 4 parts in 7 hours. Who is more efficient?

1. A book has 185 pages, and 95 pages have been read. What percentage of this book have you read? What's the percentage of unread pages in this book?

11. There are 25 sika deer and 5 giraffes in the zoo. How many times are there sika deer than giraffes? How many giraffes are there compared with sika deer?

12. There is a piece of wood. For the first time, 2/5 meters was cut off, and for the second time, 7/1 meters was cut off, leaving 4/15 meters. How long is this piece of wood?

12. There are some fruit trees planted in the orchard, among which litchi trees account for 12/27 of the total, longan trees account for 12/25 of the total, and the rest are Myrica rubra. What percentage of the total is Myrica rubra?

13. Mom bought 6g of oil, and used 1/3 on the first day and 1/4 on the second day. How much oil is left?

comprehensive exercises

1. M: A quarter of the students in our class joined the chorus group. Chinese: 2/8 students in our class participated in the model airplane group. Female: Eight students in our class participated in the sports group.

There are 4 students in this class. Which group has fewer students? What are the numbers of the other two groups?

3. A cuboid reservoir is 8m long, 5m wide and 3m deep. What is the area of this reservoir? How many cubic meters can it hold water at most?

4. Xiaoming's father made a cube fish tank with a length of 6dm from glass. How many square meters of glass do you need to make this fish tank? Xiao Ming injected 144L of water into the fish tank. What is the height of the water surface?

5. Last year, the Machine Tool Plant completed 1/6, 1/5, 4/15 and 7/1 of the annual tasks respectively. How many parts of the annual plan was exceeded last year?

6. A batch of steel was delivered from the construction site, including 2 tons of round steel, 2/5 tons of square steel and 1/7 ton of other steel. How many tons of steel are there?

7. Look for

a two-digit number, and exchange the numbers on the ten digits and the one digit. The two digits obtained are still prime numbers, and write two such two digits.

8. Come into life

Students from Class 5, Grade 5 perform in a queue, with 12 or 16 people in each row. It is known that there are less than 5 students in this class. Can you figure out how many students there are in this class?