Grade 5 Assignment Questions are simpler 5

1 To make a rectangular bathtub (without a lid), 8 decimeters long, 4 decimeters wide, and 6 decimeters high, how many square decimeters of glass do you need at least? If you pay 4 yuan per square decimeter of glass, how much money do you need to buy glass at least?

2 A room is 6 meters long, 3 meters wide, and 3 meters high, with doors and windows of 8 square meters. Now to cement the four walls and the top of this room, how many square meters of area should the cement be painted? If you need 4 kg of cement per square meter, how many kg of cement do you need?

3 How many kilograms does a cube of stone weigh about kilograms per cubic meter of stone with an edge length of 5 decimeters?

4 A box of biscuits is 20 cm long, 15 cm wide and 30 cm high, and now it is necessary to put label paper around it, what is the square centimeter area of this label paper?

5 How many bricks does the school need to buy if it needs 525 bricks per cubic meter to build a wall 20 meters long, wide and 2 meters high?

6 A cuboid tank contains 60 liters of potions, and it is known that the tank is 5 decimeters long and 3 decimeters wide, how many decimeters is it deep?

7 How many centimeters is the length of a cube of iron that is 80 centimeters long, and now it is to be cast into a cuboid with a cross-sectional area of 20 square centimeters?

8. The area of a surface is a cube of 36 square meters, and what is the sum of all its edges?

9. If a rectangular frame with a length of 10 cm and a width of 7 cm is welded with this wire, how many cm should it be high?

10. Every day swimming pool, 25 meters long, 10 meters wide, deep meters, tile laying around the pool and at the bottom of the pool, if the side length of the tile is 1 decimeter square, then at least how many tiles are needed?

11. How many pieces can be cut into a cube with an edge length of 12 cm into a small cube with an edge length of 3 cm?

12. A kind of rectangular cardboard box, 10 cm long, 6 cm wide, 5 cm high, with 2 square meters of cardboard 210 sheets, how many such cardboard boxes can be made? (excluding interfaces).

13. The sum of the edges of a cuboid is 72 centimeters, its length is 9 centimeters, its width is 6 centimeters, and its surface area is how many square centimeters?

14 How many cubic decimeters does a brick have in length 24 centimeters, decimeters in width, and 6 centimeters in thickness?

15 How many liters of water can be filled in a cube-shaped glass fish tank, measured from the inside to meters long?

16 A rectangular bunker filled with sand was 3 meters long, 2 meters wide and 2 meters deep, and weighed 1,400 kilograms per cubic meter of sand. How many tons of sand are in this bunker?

17 If there is a square piece of timber with a cross-section of 2 centimeters, how much does this square timber occupy when it is placed? What is the volume?

A math reader and a Chinese reader. How much do two books cost?

Solution: If a large truck transports x tons each time, then the next truck transports (x-2) tons each time 28x=36 (x-2).

28x=36x-72

72=8xx=9x-2=9-2=7

A: ......Solution: After X years, the father is twice as old as the son.

38=2（11+x）

38=22+x

16=x Answer: ......

1.Solution: Set up a large truck to transport x tons each time, then a small truck to transport (x-2) tons each time to the title of the knowledge:

28x=36(x-2);

Solution: x=9

A: Large trucks carry 9 tons each time, and small trucks carry 7 tons each time

2 Solution: Let the father be twice as old as the son after x years, and get:

38+x=2(11+x)

Solution: x=16

A: After 16 years, the father is twice as old as the son