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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?
First, divide 135 and 120, find out the least common factor, which is 15, so the side length is 15135, divide 15 by 9120, divide 15 by 8, so it can be cut into 8 times 9 for 72
At present, there are 175 apples, 210 pears and 280 oranges, which can be packed into the same number of gift bags for kindergarten children. How many bags can they hold? How many of the three kinds of fruit in each bag?
175 = 5 × 5 × 7; 210 = 2 × 3 × 5 × 7; 280 = 2 × 2 × 2 × 5 × 7; so the greatest common factors of 175, 210 and 280 are: 5 × 7 = 35; 175 ／ 35 = 5 (pieces); 210 ／ 35 = 6 (pieces); 280 ／ 35 = 8 (pieces). A: it can be packed into 35 bags, with 5 apples, 6 pears and 8 oranges in each bag
1. There are 32 boys and 28 girls. What's the proportion of girls to boys and what's the proportion of boys to girls?
2.6 / 5 * 2 / 3-2 / 7 △ 7 / 8 (column step off formula calculation)
3. The students went to Lele's home for 8 people. Lele bought four bottles of Coca Cola, 1 / 4 liter each. He wanted to pour a cup of Coca Cola for each person. If each cup of coke is 1 / 5 liter, is the four bottles of Coca Cola enough for Lele? How many cups for each person?
4. If the number of class 5 (1) is 2 / 5 more than that of class 5 (2), how much less is the number of class 5 (2)?
5. There are 84 people in class five (1) and class five (2), and there are 58 people in 5 / 8 of class five (1) and 3 / 4 of class five (2). How many people are there in each class?
1.7/8 8/7
2.6/5*2/3-2/7÷7/8
=4/5-16/49
=196/245-80/245
=116/245
3.4x5/4 △ 1 / 5 = 25 cups
25÷8=3…… one
So each person has three cups, and the rest one
4.2/5÷(1+2/5)=2/7
5. 538 of class 5 (1) and 1 / 4 of class 5 (2) have a total of 84-58 = 26
3 / 2 of class five (1) and class five (2) are 26x4 = 104
So 1 / 2 of class five (1) is 104-84 = 20
So the number of class 5 (1) is 20 x 2 = 40, and class 5 (2) is 84-40 = 44
First simplify, then evaluate: B ^ 4 + (- a-b) (- A + b) (a ^ 2 + B ^ 2), where: a = - 1, B = 2011
Xiao Ming took 32.5 yuan to buy a science and technology book, a story book and a comic book. The price of science and technology book is twice that of story book, and story book is 1 times cheaper than comic book
3 yuan. How much are comic books, story books and science and technology books?
17.875 4.875 9.75
When car a reaches 4 / 7 of the whole journey, the ratio of the distance that car B has traveled to the rest is 3:2. At this time, the distance between the two cars is 120 kilometers. How many kilometers is the distance between the East and West cities? (don't use solving equation)
3+2=5
2/5+4/7=34/35
1-34/35=1/35
120 divided by 1 / 35 = 4200
How many kilometers is it from Nanjing to Shanghai?
3*98+11=307
Answers to reading questions in Chinese exercise book 26
It's "shut the door and beat the dog."
Finding the greatest common factor and least common multiple of 77,28,33 by short division
The greatest common factor is 1
The least common multiple is 924
If 1 / 2 of x = 2Y (x times y is not equal to 0), then what is the proportion between X and y
In inverse proportion
Because: the product of X and Y is fixed value 1 / 2
Y decreases with the increase of X and Y increases with the decrease of X,
RELATED INFORMATIONS
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- 6. 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
- 7. 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,
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- 11. 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?
- 12. (2x-3) x + (3-2x) 5 = 4!
- 13. (1 / 5 + x) △ 4 = 3
- 14. 3(x-2)(x+1)-2(x-5)(x-3)
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- 16. 2-1/6(x+5)=x-1/3(x-1) To the denominator solution equation, to the process, thank you!
- 17. |x-5|/2-1=3
- 18. Judge: 8 is the solution of equation 5x = 40, right? Whether to add x = 8 is the solution of equation 5x = 40
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- 20. Solution equation: 1 + x = 8 / 7 x + 1 / 8 = 15 / 16 X-5 / 12 = 3 / 8 x-3 / 4 = 1 / 2