The application questions please column must be fast

1. There are 150-30 = 120 pear trees in the orchard, and the proportion of pear trees in peach trees: 120 150 100% = 80%.

2. Production of TVs in the second quarter: 6000 (1+1 8)=6750 units.

3. The edge length of the new cube is: 8 (1+1 4)=10 cm.

Then the surface area is: 6 10 10 = 600 square centimeters.

Then the volume area is: 10 10 10 = 1000 cubic centimeters.

4. Three-fortieths of a square meter = 3 40 100 = square decimeters.

Sixteen liters of twenty-fifth = 16 25 1000 = 640 ml.

450 cubic decimeters = 450 1000 = cubic meters.

Four-thirds = 4 3 60 = 80 points.

There is an error upstairs, it should be:

Platform. In the second quarter, 6,750 television sets were produced.

3.The edge length of 8 cm is increased by 1 4 to 8* cm.

The surface area of this new cube is 6*10*10=600 square centimeters.

The volume of this new cube is 10*10*10=1000 cubic centimeters.

The upstairs part is wrong, it should be:

Three-tenths of a square meter = (square decimeter Sixteen fifths of a liter = (640) milliliters.

450 cubic decimeters = (cubic meters, four-thirds of an hour) = (80) minutes.

Solution: If the number of boys is 7x, then the number of girls is 5x. 7x：5x+12=9：7

Solution x=27

So 5x+12=5*27+12=147 (person) Answer: There are 147 female students in the school.

Solution: If the number of boys left is x, then the number of girls left is 2x, and the number of girls is (2x) (10 11)=(11x) 5, and the number of boys is (11x) 5-2.

From the meaning of the title. x+22=（11x）/5-2

Solution x=20

So the number of sixth graders is: (11x) 5-2+(11x) 5=(11*20) 5-2+(11*20) 5=86 (people).

A: There are 86 people.

Solution: Let one of them be x in length, then the other is 24-x from the title. 1-2 3) x + (1-3 5) * (24-x) = solution x = 15

The other is: 24-15=9

A: The first wire is 15 meters long and the second wire is 9 meters long.

After answering carefully, give it to me, thank you!

1200 (1+20%)=1000 (RMB).

1200 (1-20%)=1500 (yuan).

Original price: 1000 + 1500 = 2500 (yuan).

Selling Li Lifting Price: 1200x2=2400 (Yuan) hidden open.

Loss: 2500-2400 = 100 (yuan which carries bi).

Cost: 1200 (1-20%)+1200 (1+20%), Chachang=1500+1000=2500

Lost 100

Set the original rush to have a 19-inch X-set, and a 17-inch 75-x set.

75-x)/3+x*60%=75-42

25-x/3+

4x/15=8

x=30 original 30 units of 19 inches.

75-x)/3+x*60%=75-42

25-x/3+

4x Min with Bu Qiao Sui 15 = 8

x=30 original 30 units sold leather 19 inches.

Therefore, the time to go up the mountain is 7*4 (4+3)=4 hours, it takes 7-4=3 hours to go down, and the total distance up and down the mountain = 4*3+3*4=24 kilometers.

Then it also took 4 hours for B to go up the mountain.

When A walked 2 3 of the total distance, that is, he walked 24 * 2 3 = 16 kilometers, then went down the mountain and walked 16-4 * 3 = 4 kilometers, at this time B walked 3 4 of the total distance, that is, he walked 24 * 3 4 = 18 kilometers, that is, he walked 18-4 * 3 = 6 kilometers down the mountain, that is to say, the time for A to go down the mountain for 4 kilometers is equal to the time for B to walk 6 kilometers, so the speed of A going down the mountain: B going down the mountain speed = 4:6

Then B descends at a speed = 6 km/h.

Then B total time = 4 + 3 * 4 6 = 6 hours.

A walks 3 kilometers per hour up the mountain and 4 kilometers down the mountain, and the two sections are equal, so the time of A going up the mountain is 12 3 = 4 hours, going down the mountain is 12 4 = 3 hours, and the total distance up and down the mountain = 4 * 3 + 3 * 4 = 24 kilometers.

Then it also took 4 hours for B to go up the mountain.

When A walked 2 3 of the total distance, that is, he walked 24 * 2 3 = 16 kilometers, then went down the mountain and walked 16-4 * 3 = 4 kilometers, at this time B walked 3 4 of the total distance, that is, he walked 24 * 3 4 = 18 kilometers, that is, he walked 18-4 * 3 = 6 kilometers down the mountain, that is to say, the time for A to go down the mountain for 4 kilometers is equal to the time for B to walk 6 kilometers, so the speed of A going down the mountain: B going down the mountain speed = 4:6

Then B descends at a speed = 6 km/h.

Then B total time = 4 + 3 * 4 6 = 6 hours.

The above text was found by the landlord on the Internet! ~

Single distance: 3*4=12 Then the total distance up and down the mountain: 12*2=24 Solution: Let B take x hours to complete the journey.

。And then I won't ... Ay.

Solution: Let the second-level tea be x kilograms, then the first-level tea is 2x, and the equation is as follows

1-1/3）*2x*（

4x/3*x=75

So the weight of the first-grade tea is 2x=150 kg.

The columnar formula is calculated as follows: 460

150 kg.

First of all, the profit per kilogram of first-class tea is: In the same way, the profit per kilogram of second-grade tea is 16*.

Let the first grade tea have x kilograms, then:

The equation is not solved first, and it is converted into x=??? , and then the equation on the right. Not much to explain.

1 6 (6 5-1) = 40 m2, (370 + 8 10) (8 + 10) = 28 yuan (5 12 + 3 15) = 8

A transport: 5 12 8 = 480 tons.

B transport: 840-480 = 360 tons.

1.The second day is six-fifths of the first day, and the second day is full-length (one-sixth six-fifth) = one-fifth.

The second day is more than the first day (one-fifth-one-sixth) = one-thirtieth of the length, and the second day is more than the first day (one-thirtieth 1200 = 40 meters).

1 6 6 5 = 1 5 1 5-1 6 = 1 30 1 30 1200 = 40 (m).

2.(with equations).

Solution: If the unit price of basketball is X yuan, then the unit price of football is (X-8) yuan.

8x+10(x-8)=370

8x+10x-80 =370

18x=370+80

18x=450

x=25A: The unit price of basketball is 25 yuan.

3.(by analogy).

A single full vehicle sortie transportable weight: B single full vehicle dispatch transportable weight = 5 12:3 15 = 60:45 = 4:3

840 (4+3) = 120 (ton) (weight of one serving).

A should be carried: 120 4 = 480 (tons).

B should be carried: 120 3 = 360 (tons).

A: Team A should transport 480 tons of goods, and Team B should transport 360 tons of goods.

1.The solution can be obtained from the question, on the first day 1200 * 1 6 = 200 [m], on the second day repaired 200 * 6 5 = 240 [m].

2.If the unit price of football is X yuan, then the basketball is [X+8] yuan.

10x+8[8+x]=370

8x+64+10x=370

18x=306

x=17, so the unit price of basketball is 25 yuan.

3.Solution 840 [5*12+3*15]=8 [vehicles] Team A 5*12*8=480 [tons].

Team B 3*15*8=360 [tons].

There may be something bad about the writing, so please bear with me.

1200 * one-sixth multiplied by six-fifths is equal to 240 football x yuan basketball (x+8) yuan 8x+64+10x=370 18x=306 x= 27 basketball 35 yuan A transports 60 tons each time B 45 tons A is equal to = 4; 3 840 7 4=480 A480 B360

1.A and B are 300 kilometers apart, and a car is still 60 kilometers away from B three hours after it leaves from place A. How many kilometers does this car travel per hour?

80 km. 2。In order to celebrate this year's Children's Day, the experimental primary school set up a choir, the choir has a number of people, if 12 people stand in a row, the remaining 5 people; If 15 people stand in a row and there are 5 people left, how many people are there in this choir at least?

The number of people in this choir is at least the least common multiple of 12 and 15 plus 5, i.e. 60 + 5 = 65 people.