Primary 6 Math Problem 10

If there is 3x for female employees, 2x for male employees

2x+3x=4500

x = 900 3x = 2700 for female workers and 2x = 1800 for male workers 2 3 for female workers

Description: Male employees account for 2 5 = 2 5x4500 = 1800, female employees account for 3 5 = 3 5 5 5500 = 2700, and male and female employees are x and y respectively

x:y=2:3...y=2/3x

x+y=4500

x=2700 y=1800

1. Set up x number of female employees.

x+2/3x=4500

Solution. x=2700

1,800 male employees and 2,700 female employees

1+2 3) = 2700 (person).

4500-2700=1800 (person).

1,800 male employees and 2,700 female employees

3. There are x male employees and y female employees.

x+y=4500

x=2/3y

The solution is x=1800, y=2700

Question 1: Set x

20%x=9

x=45 Question 2:

x+8 multiplied by 40%=8

x+x=Hopefully!

1.= Answer: A certain number is.

2.4 9 3 8 =4 27 8 =32 27 =1 5 27 Answer: The total length of the rope is 1 5 27 meters.

3.3 15 16 litres = 63 16 litres 1 + 20 = 21 63 16 21 =63 16 1 21 =3 16 A: The average person drinks 3 16 litres of mineral water.

Reference: sandy

Check it out below

m1) Let's assume that a number is x x = .x=( The correct answer is x A certain number is a certain number divided by the quotient (2) The third part is 4/9 meters long, so the first equal part is 4/27 of a meter long, and the total length is 32/27 meters (4 9) 3*8=(4 9)*(8 3)=32 27 (if it is a fraction, the answer is 1 and 5/27) (3) Xiao Jia and the 20 classmates in the class (so a total of 21 people) 3 and 15/16 liters (a false fraction is 63/16) will be 63/16 liters Divide by 21 people and the answer is (63 16) 21 = (63 16) * (1 21) = 3 16 The answer is 3 16 liters.

Reference: I am a math tutor myself.

1.Let a certain number x show that x = decimal point, second digit rounded off) = 2It can be known from 3 equal parts 4 9 1 equal parts 4 27 = [(4 9) 3] so (4 27) 8 = 32 27 m and 15/16 = 63 16 (63 16) 21 = 3 16 Note:

The meaning of the fraction is the meaning of the fraction.

Reference: Yourself.

1.Divide by a certain number, miscalculate as dividing, and the result is a quotient surplus, and the correct answer is more pure divination and less difference? (Quotient to the first decimal place) a certain number =, 2

After dividing a rope into 8 equal parts, the length of the 3 equal parts is 4/9 meters, how many meters is the total length of the rope? Let the total length of the rope be 32 27 meters, 3x 8=4 9, and x=32 27Xiao Jia and the 20 classmates drank a total of 3 and 16/16 of 15 liters of mineral water, and how many liters of mineral water did each person drink on average?

Twenty-one people drank 63 16 litres of mineral water, (63 16) 21 = 3 16, and each person drank an average of 3 16 litres of mineral water for skinning.

1.Let a number be x x x = 2 4/9*1/3*8=32/27 3.3 and 15 16 = 63 16 63 16 * 1 20 = 63 320

1.Behind the sides of the cylinder is a rectangle (in fact, a square),'The height was shortened by 2'It is equivalent to a shortening of one side of the rectangle by 2, and since the area of the two bottom surfaces has not changed, the side area (that is, the area of the rectangle!) Reduced.

From this, it can be calculated that the other side (side length) of the rectangle is the circumference of the base, and of course the height is also, the radius of the base is , and the volume is *

2.When C meets B, the distance from A is (4+6)*12 60=2, that is, the distance between A and B is 2, so A and B have walked a total of 2 (5-4)=2 (hours) from the beginning to the present

The distance between the two towns is (5+6)*2=22

（101-100）＋（103-102）+（105-104）+.189-188）＋（191-90）＋（193-92）+.199-98）

Note: 101 to 189 is a group, 191 to 199 is a group of numbers, and (189-101) 2 1=45, (199-191) 2 1=5

7 hours and 20 minutes = 440 minutes.

4 hours and 40 minutes = 280 minutes.

Time ratio 440:280=11:7

The distance is equal, so, the speed against the water: speed against the water = 7:11 speed against the water = speed of the ship - speed of the current = speed of the ship - 6 speed of the water = speed of the ship + speed of the current = speed of the ship + 6 So, the speed of the ship = 27 km/h.

The distance between the two ports = (27-6) * 440 60 = 154 km.

7 hours and 20 minutes = 7 and 1 3 hours = 22 3 hours and 40 minutes = 4 and 2 3 hours = 14 3 hours against the water, 1 22 3 = 3 22 in the whole course of the hour, 1 14 3 = 3 14 in the whole course of the hour, the difference in speed per hour is 2 times the speed of the water.

The distance between the two ports of A and B: 6 2 (3 14-3 22) = 154 km, the speed of the ship against the water: 154 3 22 = 21 km, the speed of the ship in the still water: 21 + 6 = 27 km/h.

7 hours and 20 minutes = 22 3 hours 4 hours 40 minutes = 14 3 hours solution, set the speed of the ship to x km/h.

22/3*（x-6）=14/3*（x+6）x=27

So the distance between A and B is 22 3 * (x-6) = 154 (km) Answer: The distance between A and B is 154 km.

When the speed of the ship is x kilometers, the distance between ports A and B is y kilometers.

Then y=(x+6)*22 3

y=（x-6）*14/3 ②

Then bring the formula into the formula and calculate x and y respectively.

If the unit price of football is 6k, the unit price of basketball is 5k

16*5k+12*6k=760, the solution gets k=55k=25, 6k=30

So the unit price of football is 30 yuan, and the unit price of basketball is 25 yuan.

Football: 30 * 12 = 360 yuan.

Basketball: 25*16=400 yuan.

If the price of a basketball is 5x, the price of a soccer ball is 6x. The equation can be derived:

16×5x+12×6x=760

The x of the solution is 5Then you can see that the price of the basketball is 25 yuan. The price of a soccer ball is $30.

So it cost 400 yuan to buy basketball and 360 yuan to buy football.

If ** is 5x, 6x, then 16 * 5x + 12 * 6x = 760, x = 5, basketball is 25 yuan, and football is 30 yuan.

Let the basketball be $x, and the football can be $6x from the title.

16×5x+12×6x=760

152x=760

x=55x=25 6x=30

16 5x 12 6x=760 Basketball pays 5x and football costs 6x. x=5 5x=25 6x=30

The unit price of basketball is 5x 6x football

16*5x+6*12x＝760

152x＝760

x 5 basketball 25 yuan football 30 yuan apiece.

Basketball pays 25*16 400 yuan.

Football 760-400 360 yuan.

1.The increased area is 2r * h , while h is 1 m, so r = m = 2 dm.

Volume v=pi* r*r*h= 40 pi (pi= cubic decimeter.)

2.Find the pattern, the nth number is.

n-1) 2+1 when n is odd;

n 2+1 when n is even.

The 35th digit is (35-1) 2+1=18

3.Set up water t, you need to pay a fee:

When t<=5

8+2*(t-5) t>5

Xiao Ming's family paid 38 yuan for water last month, and Xiao Ming's family used (38-8) 2+ 5= 20 tons of water last month.

4.Earn 10% of that book, the original price is 50 (1+10%) lose 10% of that book, the original price is 50 (1-10%) obviously 50 (1+10%) 50 (1-10%) 50 + 50 so lose money.