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 Cement should be coated around the fish pond to prevent water seepage. If water is used per square meter,

5 kilograms of mud, 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 area of the glass during maintenance was ().

Volume calculation

1, a rectangle is 4 decimeters long, 2.5 decimeters wide and 3 decimeters high. 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 kind of rectangular steel, which is 2 meters long and the cross section is a square with a side length of 5 centimeters. 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 a square with a side length of 3 m at the 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?

Comprehensive exercises of volume and surface area

1, 80 squares are piled up 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?

Fraction application problem

1., 12 sweets, distributed to 3 people on average, how many sweets does each person get?

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. look for it

A two-digit number, the number of ten digits is exchanged with the number of one digit, and the two digits obtained are still prime numbers. Write two such two-digit numbers.

8. Step into life

Students from Class Five, Grade Five lined up to perform. There are 12 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?

There are 40 students in 1 class and 5 (2) * * class, and girls account for 2/3 of the boys. How many girls are there?

2. Liang Xiao saved 18 yuan, Xiaohua saved 5/6 of that of Xiao Liang, and Xiaohua saved 2/3 of that of Xiaohua. How much did Xiao Xin save?

Mother bought Xiaohong a suit. The price of a pair of trousers is 60 yuan, which is 2/3 of that of a coat. How much is this coat?

The distance between Party A and Party B is 400 kilometers. A car has traveled 1/5 from A to B. How many kilometers does it take?

5. "Star" Children's Wear Factory produced 1260 sets of children's wear in April, exceeding the original plan 1/5. How many sets of clothes were originally planned to be produced?

6. Cartoon toy cars. It turns out that the price of each 20 yuan is lower than the original price 1/5. What's the price of each car now?

7. A machine factory originally planned to produce 2,400 machine tools, but actually more than 600. What percentage of the original plan was actually completed?

There are 200 apple trees in an orchard, 80 of which are more than 4/5 of pear trees. How many pear trees are there?

9. How many square decimeters of iron sheets do you need to make five 5-decimeter-long uncovered cubic sinks?

10, the volume of a cuboid oil drum is 18 liter. Its length is 25 cm and its width is 16 cm. How many centimeters is the height of this oil drum?

1 1. The side length of a cubic tea box is 0.8 meters. If each cubic decimeter can hold 40 grams of tea, how many teas can this tea box hold?

12, a cuboid wood, 2.5 meters long, with a cross-sectional area of 1.44 square decimeter. What is the volume of this piece of wood?

13. A classroom is 8m long, 6m wide and 4m high. To paint the roof and four walls of the classroom, excluding doors, windows and blackboards, covering an area of 25.4 square meters. What is a painting area?

14. Every apple tree benefited from 250 yuan last year. Through scientific pruning this year, the income per tree increased by 16%. How much did each tree harvest this year?

15, Xiaoming collected 3/5 stamps of Liang Xiao, and his collection of stamps was 60 less than that of Liang Xiao. How many stamps did Xiaoming and Liang Xiao collect respectively?

16, a highway has been built, accounting for 60% of the total length and 10 km, with 40 km left. How many kilometers is this road?

17. When the height of a cuboid increases by 2 cm, it becomes a cube, and its surface area increases by 48 square cm. What is the volume of the original cuboid?

18, a rectangular fish tank. Measure 1.8m, 6m wide and 8m high from the inside. How many liters of water can this fish tank hold at most? How many milliliters?

19. There are 104 sophomores in Dongfang Primary School, which is 8/9 of the fourth grade, and the fourth grade is 3/ 13 of the whole school. How many students are there in the school?

20. There are three kinds of flowers in the big flower bed of a school. There are 60 pots of Chinese rose flowers, accounting for 20% of these three kinds of flowers. Peony flowers are 9/25 less than the total number of these three kinds of flowers. How many pots of peony flowers are there?

There are 23 boys and 22 girls in Class 2 1 and Class 5 (1), and the class size accounts for 3/ 10 of the total number of students in Grade 5. How many people are there in the fifth grade?

22. Xiao Fang and Xiaoli jump rope. Xiao Fang jumps 30 times less than Xiaoli, and Xiao Fang jumps 5/7 of Xiaoli's. How many times did they jump?

23. There are 2450 literary books in a bookstore, and 3/7 literary books are exactly equal to 2/3 story books. How many story books are there?

24. The price of a table is 90 yuan, and the price of a chair is cheaper than a table 1/6. How much is a chair?