![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
(2x-3) x + (3-2x) 5 = 4!
x/(2x-3)+5/(3-2x)=4
x/(2x-3)-5/(2x-3)=4
x-5=4(2x-3)
x-5=8x-12
8x-x=12-5
7x=7
x=1
The volume of a cube water tank is 360 cubic decimeters. If you fill the tank with water and pour it into a cuboid water tank 1.8 meters long and 0.4 meters wide, how high is the water surface?
The answer is: 0.5 meters 360 cubic decimeters = 0.36 cubic meters, 0.36 divided by (1.8 times 0.4) = 0.5 meters
Look at the numbers below. What is the number after 48?
9,12,21,48
9+3=12
12+9=21
21+27=48
48+81=129
The nth number is n-1 times of the previous number plus 3,
So the number after 48 is 129
Solve the plane equation which passes through points (2,3,4) and is parallel to the plane 3x-7y + 5z-11 = 0
3x-7y+5z-5=0
Mathematics calculation problems in the seventh grade mathematics volume II
[20-（12-8）*4]/2=2
[44+4(5-1)]*5=300
[(16-5)*4-30]*4=7
{[(16-10)*3-8]*2}*4=80
[(16-6)+(16-8)]*3=27
[5+(5*(6-1)]=15
[(4+8)/2+4]=5
{{(4+6*2)/2]-2}*3=18
{15+5)/10-1]*8=8
[(23-21)/2+16]*2=34
[(29-25)/2+4]/4=3
[(22-21)/11+1]*2=4
[(32-16)/4+8]*4=3
[(23+1)/2+16]/4=7
[22+(11+33)/11]*2=52
[2*(3+6)-9]*5=45
[8*(4-2)-6]*2=20
[7*(6-2)+4]/2-4=12
[8*(3-1)-6]*4=40
[5+(9-4)*2]*3=45
1-10 20 30 40 50 60 70 80 90 100 all the cardinal and ordinal words of these numbers
The score is very high
1-10 20 30 40 50 60 70 80 90 100 cardinal number: 1-one 10 ten 20 twenty twenty thirty forty forty forty forty forty forty forty forty forty forty forty fifty fifty fifty six seventy seven eighty eight ninety nine nine hundred one hundred ordinal number: 1-first 10 ten twenty twenty twenty twenty twenty twenty thirty thirty forty -
Simple calculation of 12 / 1.25
Such as the title
Why?
12/1.25
Multiply the numerator and denominator by 8
It's 96 / 10
=9.6
Xinhua Bookstore sold two kinds of books in one day, with a total of 1560 yuan for type a books and 1350 yuan for type B books sent to the countryside for the development of agricultural science and technology. According to the cost of type A and type B books, the profit of type a books is 25%, and the loss of type B books is 10%. How much is the total profit (or loss) of the bookstore in this day
Suppose the cost of a book is x yuan, and that of B book is y yuan. From the meaning of the title, we get x + 25% x = 1560y − 10% y = 1350, and the solution is x = 1248y = 1500. So the profit (1560 + 1350) - (1248 + 1500) = 162 yuan. A: the bookstore made a total profit of 162 yuan this day
30.40.50.60.70.80.90.100
thirty,forty,fifty,sixty,seventy,eighty,ninety,hundred
How to fill in 4444 with four operations of addition, subtraction, multiplication and division equal to 5
It's from my daughter's book. I thought about it
（4*4+4）/4=5
RELATED INFORMATIONS
- 1. A coal train has 20 cars of the same size. No car measures 13 meters long and 2.5 meters wide from the inside, and the height of coal loading is 1.2 meters. If the weight of coal per cubic meter is 1.4 tons, how many tons of coal does the train transport?
- 2. A complete set of formulas Cut a rectangular piece of paper 135 cm long and 120 cm wide into square pieces of paper of the same size without any surplus. What is the longest side length of a square piece of paper? How many pieces can be cut?
- 3. How to do the 42 page "thinking wide angle" of study and life in primary school summer vacation? Divide 14 into the sum of several natural numbers to maximize the product of these natural numbers. What is the maximum product?
- 4. After cutting off a 6 cm long cuboid from one end of a cuboid block, a cuboid is exactly obtained. The surface area of this cuboid is 120 square centimeters less than that of the original cuboid. What is the volume of the original cuboid?
- 5. Mr. Wang bought back some exercise books. If he was equally divided into four classes, he would get two more. If he was equally divided into five classes, he would get three more. The exercise books were between 80 and 100 all the time
- 6. There is a barrel of oil. The sum of oil and barrel is 49 kg. After using 40% of the oil, the sum of oil and barrel is () kg
- 7. Please explain the formula, 1. The rabbit has three chickens. How many chickens are there? 2. There are three little rabbits and two more chickens than Xiaomian. How many chickens are there? 3. The rabbit has three chickens. How many chickens are there? 4. The little rabbit has three chickens, which are the two companions of the little rabbit. How many chickens are there? The relationship between one company and two companies
- 8. Fifth grade math exercises Fill in the blanks: 1. The volume of a bottle of mineral water is about 500 () the volume of a car's fuel tank is about 120 () The volume of a small medicine bottle is about 10 () and the floor area of a classroom is about 70 () 2. To make a cuboid frame 15 cm long, 10 cm wide and 8 cm high, you need at least iron wire (). To paste a layer of paper outside the frame, you need at least () paper. The volume of this carton is () 3. The cuboid has a volume of 120m, a length of 5m, a width of 4m and a height of () 4. The edge length, surface area and volume of the cube increase by 2 times and () times respectively 5. Use a small cube with edge length of 1 decimeter to make a cuboid with edge length of 5 decimeter, width of 4 decimeter and height of 2 decimeter 6. The surface area of a cube is 24 square decimeters, and its volume is () cubic decimeters 7. There is a certain liquid medicine 3 liters, to be sub packed into 2 ml each bottle, a total of () bottles can be sub packed 8. The sum of the edges of a cube is 96 decimeters, and the surface area of the cube is () 9. A cuboid tank, 6 decimeters long and 2 decimeters wide, is twice as high as wide. After loading 30 liters of oil, the height of the oil is () 10. Cut a cube with an edge length of 8 decimeters into two cuboids of the same size. The volume of each cuboid is (), and the surface area is () Judgment questions: 1. Two cuboids of equal volume have the same surface area 2. 500 ml is equal to 500 cubic decimeter 3. The length and volume of the cube are 3 and 9 times larger 4. Put two cubes together to form a cuboid with the same volume and surface area 5. It takes at least eight small cubes to make a big cube 6. If the bottom area of two cubes is equal, the volume is equal
- 9. A container is filled with water. Now there are three balls, big, middle and small, which sink into water for the first time; take out the ball for the second time, which sink into water; take out the ball for the third time, which sink into water. The water overflowing from the container for the second time is three times that of the first time, and the third time is two times that of the second time, How many cubic centimetres is the volume of the big ball? (when taking the ball, the amount of water in the container remains unchanged) I need a clear solution process,
- 10. Xiaohong, Xiaofang and Xiaoli take three of the nine cards written with 10, 20, 30, 40, 50, 60, 70, 80 and 90. The product of Xiaohong's three numbers is 48000, the sum of Xiaofang's three numbers is 150, and the product of Xiaoli's three numbers is 63000. Which three cards do they take?
- 11. (1 / 5 + x) △ 4 = 3
- 12. 3(x-2)(x+1)-2(x-5)(x-3)
- 13. 5(x-2)-2(x-1)>3 The solution set is expressed on the number axis
- 14. 2-1/6(x+5)=x-1/3(x-1) To the denominator solution equation, to the process, thank you!
- 15. |x-5|/2-1=3
- 16. Judge: 8 is the solution of equation 5x = 40, right? Whether to add x = 8 is the solution of equation 5x = 40
- 17. 3(x-7)-5(4-x)=15
- 18. Solution equation: 1 + x = 8 / 7 x + 1 / 8 = 15 / 16 X-5 / 12 = 3 / 8 x-3 / 4 = 1 / 2
- 19. X to 4 / 5 = 1 / 3 to 2 / 15
- 20. Solution equation and proportion: X3 = 3.7515 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 23: x = 910:0.6 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X (1-15%) = 34