Is the special breakthrough a real question, a special breakthrough in the cuboid, the topic is exis

It may not be a real question, a special breakthrough is a special practice of a certain knowledge point, and you can choose a real question or not.

1. The volume of a rectangular water tank is 2500 liters, the bottom surface of this water tank is a square with a side length of 50 cm, how many centimeters is the height of the water tank?

50 centimeters = 5 decimeters.

The height of the water tank = 2500 (5 5) = 100 dm = 1000 cm 2, how many bricks need to be 4dm long and 3dm wide and high to build a fence wall with a volume of 80 cubic meters in the school?

4 cubic decimeters = cubic meters.

Required: 80 pieces.

3. If the edge length of a cube is expanded by 2 times, then the surface area will be expanded by (4) times and the volume will be expanded by (8) times.

4. Cubic meters = (3050) cubic decimeters.

7200 cubic centimeters = ( ) cubic decimeters.

liter = (4600) ml.

cubic decimeter = ( ) liters.

cubic meter = (70) liter = (70000) milliliter 5, is the cuboid a special cube?

No. It can only be: the cube is a special cuboid.

1, 15, the cube is a special cuboid.

liter = 2500 cubic decimeters = 2500000 cubic centimeters h = 2500000 50 50 = 1000 (cm) 2The volume of bricks: 4 * cubic decimeters).

80 cubic meters = 80,000 cubic decimeters.

80000 30 = 2666 (block) ......2 (cubic decimeters) so 2667 bricks are needed.

square) edge length is enlarged by 2 times, s=6*(2a)2=4*6a2, so it is expanded by 4 times.

v = a3 (cubic power).

The edge length is enlarged by 2 times, v = (2a)3 = 8a3

So expand 8 times.

4.cubic meters = (3050) cubic decimeters.

7200 cubic centimeters = ( ) cubic decimeters.

liter = (4600) ml.

cubic decimeter = ( ) liters.

cubic meters = (70) liters = (70,000) milliliters.

5.No, the box is not a special cube.

Cubes are special cuboids.

*50*H=2,500 liters=2,500,000 cubic centimeters, H=1,000 centimeters.

cubic meters = 80,000 cubic decimeters.

3, x, the surface area is 6x 2 the volume is x 32x, the surface area is 6 (2x) 2=24x 2 the volume is (2x) 3=8x 3

The surface area is 4 times larger and the volume is 8 times larger.

5. No. Cubes are special cuboids.

The hotel pays 30, the boss returns 5 fast, and the guy gets 2 fast from it.

3 people pay 9 yuan per person 3x9 27+2=29 It is true that there is not a single yuan, but a different way of thinking.

Ignore the buddies for now.

The boss refunded 3 yuan 3x9 27+3=30 so that there was no disappearance, why was it less than one yuan before?

Because I didn't figure out the difference between $3 and $2.

2 yuan is for the guy, if the guest room rate is 9 yuan.

Then the owner of these two dollars should be the owner of the shop.

Because it's 27+3.

3 people pay 9 yuan per person 3x9 27+2=29 It is true that there is not a single yuan, but a different way of thinking.

Ignore the buddies for now.

The boss refunded 3 yuan 3x9 27+3=30 so that there was no disappearance, why was it less than one yuan before?

Because I didn't figure out the difference between $3 and $2.

2 yuan is for the guy, if the guest room rate is 9 yuan.

Then the owner of these two dollars should be the owner of the shop.

Because it's 27+3.

It should be 27 yuan for the traveler, 2 yuan for the shopkeeper and 25 yuan for the waiter.

30 yuan is divided into 2+3+25;

The landlord's algorithm is wrong.

9 yuan per person, a total of 27 yuan, the three people came out, plus the 3 yuan they recovered, a total of 30 yuan

Its original algorithm does not add two yuan to the waiter's 2 yuan, but it is missing the three yuan recovered by those three people, so it is one yuan less plus points.

They paid a total of 30 yuan, and found 3 yuan, that is, a total of 27 yuan, 25 yuan for the hotel, and the waiter took 2 yuan. So there is no problem of missing 1 yuan.

The topic of cheating on children has been seen before.

The waiter is also one of the three.

Want to get into the crypto space? Let me tell you,Those tools that I blindly look for on the Internet,Or web cracking methods are useless.,Those who claim to specialize in cracking the QQ space album password**It's all a lie.,Even if you have that ability, it won't be free.,Die of this heart.。

Anyway, what are you going to crack?

Stealing numbers is faster than cracking! Crack the encrypted space, there is no such software yet!

The output of C can measure the level of petrochemical development of a country, and it is said that C is ethylene C2H4