Answers to practical questions Hurry up, I m in a hurry

1 inch = meter. 2500÷(26×

minutes A: It takes about 15 minutes.

1 inch = So the tire diameter of the bicycle of the floret is d = 26 * then the circumference of the tire l =

Then his velocity v=

Time t=25000 168 149min

Find out that the common factors of 48 and 32 are 2, 4, 8, and 16, and there are four divisions.

Up to 16 groups.

Group 2 has 24 male workers and 16 female workers.

There are 12 male workers and 8 female workers in Group 4.

Group 8 has 6 male workers and 4 female workers.

There are 3 male workers and 2 female workers in 16 groups.

Four groups, each group of 12 males and 8 females.

8 groups, 6 males and 4 females in each group.

2 groups, each group of 24 males and 16 females

Set rice x, flour y

20x+12y=2300

7x+3y=775

Finally 100 rice and 25 flour

A and B each make 1 part per minute, A makes 3 parts and breaks for 1 minute, and B makes 4 parts for a rest minute, then A makes 3 parts in 4 minutes and B makes 4 parts in minutes; That's easy to calculate.

Set: It takes x minutes. Solution: x 4 3+x 4=300 3x 4+4x

Multiply both sides by 220 to get: 165x+160x=66000 325x=66000 x 203 (minutes).

Verification: A: 203 4 3 152 (pieces) B: 203 pieces) 152 + 148 = 300 (pieces).

A: It takes 203 minutes.

Design: Now they have to work together to make 300 parts, which takes x minutes.

3+4)：(3+1+4+：x

7x=2850

x = 407 and 1 7

Now they have to work together to complete the task of making 300 parts, which takes 407 and 1 7 minutes.

There are 540*1 3=180 copies.

Literature and art books + science and technology books = 540-180 = 360 books.

Literary and artistic books account for 3 5, totaling 360 * 3 5 = 216 books.

kilometers per hour) The average speed of the uphill.

kilometers per hour) The average speed of the descent.

kilometers per hour) The average speed up and down the mountain.

3g of powder requires 1500g of sugar water.

Now there is only 1250g of sugar water, so you can only use 1250 500= powder, so you can use up to 1250+ potions.

250g/50min=5g/min

1:500 means that 1g of medicine is mixed with 500g of sugar water.

The sugar water required for 3g of medicine is 3*500=1500g, and now it is only 1250g, so the medicine is overdosed.

Therefore, 1250g of sugar water can be prepared with medicine.

Up to 1250+ potions (min.) can be configured.

Set x yellow balls and y green balls, and list the equations according to the meaning of the question.

x=2yx=y*4/3+18

Solve the system of equations to get x=54 y=27

A: There are 54 yellow balls and 27 green balls.

Set x green balls, y yellow balls, and take the ball n times.

Solution: y=2x

Equation 1: y-4n-14=0 3y-12n-14*3=0 6x-12n-42=0

Equation 2: x-3n=0 4x-12n=0 Equation 1 - Equation 2:

2x-42=0

x=21y=42n=7

1. The grain store brought two truckloads of flour, each loaded with 80 bags and 25 kilograms each. How many kilograms of flour did this grain store ship?

2. The mold factory planned to produce 1300 pieces of molds, and 780 pieces were produced in 6 days. At this rate, how many days will it take to produce the rest of the production?

3. 50 kg of rapeseed can be squeezed for 15 kg, according to this calculation, how many kg of oil can be squeezed for 5 tons of rapeseed?

4. Xiao Ming bought a pencil and a diary, the unit price of the pencil is yuan, and the price of the diary is yuan. Xiao Ming paid the salesman 20 yuan, how much yuan should he get back?

5. If you build a road, you have already repaired a kilometer, and the rest is less than the repaired kilometer, how many kilometers is the total length of this road?

6. The living room is 3 meters long and 3 meters wide, if you use a square floor tile with a side length of 30 cm, how many pieces are needed?

A giant panda eats a total of kilograms of bamboo leaves in two weeks, how many kilograms of bamboo leaves does each giant panda eat every day?

8. Xiaoqiang is taller than Xiaohua, Xiaohua is 22 centimeters shorter than Xiaofang, how many meters is Xiaofang taller than Xiaoqiang?

9. There are 45 people in class five (1) who have participated in the interest group, which is twice as many as the number of classes five (2), how many people have participated in the interest group in the two classes?

10. The circumference of a square is decimeters, and the area of this square is how many square decimeters?

Set up a waiting room for the number of passengers waiting for the Shenshou Zen ticket check for x people, and passengers will be added according to the speed of y people per minute.

x+30y=30*1

x+10y=10*2

Solve the wide dust. x=15y=

Depending on the title, take 4

At least 4 ticket gates must be open at the station at the same time.

Set passengers according to a person minutes in the increase, the speed of checking the ticket for B people, waiting for passengers in the station after the station Shengtong car room for C people, within 5 minutes of all passengers checking into the station, ask Shuxiaochang This station should open at least x ticket gates at the same time.

c+30a=30b

c+10a=2*10b ==2a=b,c=30ac+5a=x*5b==30a+5a=x*5*2a==35=10x==x= take 4