A math problem in Volume 1 of grade 6 A cube is cut off from the diagonal, with length? Width 25cn and height 15cm. The cut slope is 32cm long and 25cm wide. Calculate the area of the triangle Note: International Edition primary school mathematics practice every day, grade 6, Volume 1, page 24, question 5, question 6 The original title is: 6. The shape of Xiaoming's iron dustpan is shown in the figure on the right. What's the volume of this dustpan? We should use the sixth grade method to solve the problem, otherwise we should not It's a cuboid, not a cube

32*15*25/2=6000

If we transport 52 tons of rice from warehouse A to warehouse B, the tons of rice in these two warehouses are equal. How many tons of rice are there in each warehouse?

If B warehouse has x tons, a warehouse has 1.8x tons
1.8x-52=x+52
x=130
A warehouse is 130 * 1.8 = 234 tons

Grade 6 Volume 1 math exercise 12 question 7
The ratio of number a to number B is 2:3, the ratio of number B to number C is 4:5?

8:15

Make 12 cylindrical ventilation pipes with iron sheet. The diameter of the bottom surface of each ventilation pipe is 6 decimeters and the length is 80 decimeters. How many square meters of iron sheet is needed at least

Iron sheet = 12 × 6 × 3.14 × 80 = 18086.4 square decimeter ≈ 18 square meter

A commodity is priced at 20% profit and then sold at a 20% discount. Now each commodity is sold for 864 yuan. What is the cost price of this commodity?

The original price is 864 / (0.8) = 1080 yuan
Cost 1080 / (1 + 0.2) = 900 yuan

Grade 6 math problem: 23 of 24 is ()

Two thirds of 24 is (16)

84 13——14
If you subtract 6 meters from a wire, the rest is 1 meter shorter than 60% of the total length. How many meters are left?
There are 80 grams of salt water with 20% salt content. If 4 grams of salt are poured in, a new salt water will be made

The answer to the first question is: let the original length be X
X-6=60%X-1
X-60%X=5
40%X=5
If x = 12.5, 6.5m is left
The answer to the second question is: there are 16 grams of salt in 80 grams of salt water. When 4 grams of salt are added, there are 20 grams of salt and 84 grams of salt water. The salt content is 20% and 84 is about 23.8%

In a football round robin with 12 teams (every two teams must play one game), it is stipulated that 3 points will be recorded for winning one game, 1 point will be recorded for drawing one game, and 0 point will be recorded for losing one game?

Suppose the team wins X Games and draws y games. Then x + y + (x − 2) = 113x + y = 18, and the solution is x = 5Y = 3

Three matchsticks, 12 right angles,

Build a cube: first cross two pieces, then cross the center of the cross with another matchstick

If the two toys are sold at the same time, the selling price is 120 yuan. One can earn 25% and the other can lose 25%. If the two toys are sold at the same time, is it a loss or a profit? If so, how much is the loss? If so, how much is the profit?

The amount of money lost: 120 △ 1.25% - 120, = 120 △ 0.75-120, = 160-120, = 40 (yuan); the amount of money earned: 120-120 △ 1.25, = 120-96, = 24 (yuan); because 40 yuan is more than 24 yuan, the merchant lost, 40-24 = 16 (yuan). Answer: this loss, 16 yuan