The fifth grade mathematics book 125 pages 16 questions

3.8 * 180 = 684 yuan 684 / 3.6 = 190 pieces

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1. 1. A number 1 / 5 is 3 less than its 1 / 4. What's the number? 2. 2 / 3 of a number is equal to 5 / 7 of 4 / 9 3. 12 plus 2 / 5 of a number, and 30, find the number 4. What's the product of 2 / 3 plus 1 / 4 divided by 3 / 4? 5. The sum of the quotient of a number divided by 1 / 5 plus 1 / 2 is four and a half 6. The quotient of 7 / 13 divided by a number is equal to the product of 9 / 11 multiplied by 11 / 13 7. 1 / 3 times of a number is equal to 5 / 7 of 4 / 5 8. A number plus four is exactly equal to four times one and three fourths 9. A number minus 3 / 4 equals 2 / 3 of 1 / 2. What's the number? 10. How much less is 5 / 6 of 3 / 4 than 2? 11. 5 / 18 of a number is 20. What's 7 / 12 of this number? 12. 2 / 3 of a number is 60. What's 7 / 9 of this number? 13. 3 / 5 of a number is 48. What's 7 / 8 of this number? 14. 7 / 8 of 24 is 7 more than 2 / 7 of a number. What's the number? 15. 3 / 4 of a number is 12 more than 60. What's the number? 16. The number a is 36, and the number B is 4 / 9 of the number A. what is the sum of the two numbers a and B? 17. The ratio of a to B is 5:7. A is 30. What is B? 18. The ratio of a to B is 5:6. The sum of them is 66. What is the difference between them? 19. What is the quotient of 8 / 13 divided by 7, plus the product of 1 / 7 and 6 / 13? I'm sorry! But I hope you can answer enthusiastically! Because I'm really in a hurry! I have worked out questions 4, 10, 16, 17 and 19! You don't have to do these questions! In other words, you can do 5 less questions. (in order to avoid your confusion, I repeat that you don't have to do questions 4, 10, 16, 17 and 19! Do everything else) I've already reported all of you who won't answer well! Don't bother me!
2. [mathematics] when m is a value, y = MX ^ m & # 178; - 2m-1 is a quadratic function, and when x > 0, y decreases with the increase of X When m is the value, y = MX ^ m & # 178; - 2m-1 is a quadratic function, and x > 0, y decreases with the increase of X? Write the expression of the function, and answer whether the function has a maximum or a minimum? What is it? If the image of function y = ax & # 178; (a ≠ 0) passes through point (a, 1), then the value of a is ()
3. The original price of a Skyworth color TV set is 4000 yuan. The shopping malls carry out promotional activities, first raise the price by 1 / 10, and then reduce the price by 1 / 10, How much is the current price of this color TV set?
4. 2.The probability of A’s winning a hockey match is 3/2 times the probability of B’s winning a cricket match.The probability of C’s winning a race is twice the probability of B’s winning the cricket match.What is the maximum probability of A’s winning the hockey match? (A) ¼ (B) ½ (C) 2/3 (D)¾ (E) 1
5. The price of Haier computer is 2 / 11 lower than the original price. Now the price is 3600 yuan. How much is the original price
6. Several mathematics problems in grade one of junior high school~ In a certain month, Mr. Wang will participate in three days of business training. The sum of the numbers of the three days is 39. If the training time is three consecutive days, then the three days are respectively the 12th, 13th and 14th. If the training time is three consecutive weeks of Saturday, what are the dates of the month, the 13th and the 14th? According to the regular arrangement of a column of numbers: 2, - 4,8, - 16,32, - 64,..., in which the sum of some four adjacent numbers is - 640, how much is the difference between the maximum number and the minimum number of these four numbers? [Note: the solution of column equation is urgent!]
7. If a commodity is sold at a 10% discount, it will make a profit of 20 yuan. If it is sold at a 70% discount, it will lose 10 yuan How many yuan? (use the equation of one yuan once, put a problem into a formula and answer it in detail)
8. 1. The perimeter of a round flower bed is 50.24 meters. There are two kinds of flowers in it. The area ratio of chrysanthemum to camellia is 2:5. What are the areas of these two kinds of flowers? 2. The area of a circle and a rectangle is equal. The circumference is 18.84 cm, and the rectangle is 6 cm long. How many cm wide is it? 3. After a circle is divided into several parts, it can be put together into a rectangle with a circumference of 20.7 decimeters. How many square decimeters is the area of the circle? 4. Cut a maximum circle of 18.84 cm from a square paper and calculate the area of the paper to be cut 5. If the perimeter ratio of circle a and circle B is 3:5, the ratio of circle a to circle B is () 6. If the diameter ratio of two circles is 3:2, then their radius ratio is () and their perimeter is () and their area ratio is ()
9. A right angled trapezoid has an upper base of 8 cm and a lower base of 15 cm. Cut out the largest triangle in the right angled trapezoid, and the remaining area is 37.8 square cm Q: what is the area of the original trapezoid?
10. A few biology fill in the blanks Animal cells and most plant cells, the outside of the nucleus is coated with (), and there is a clear boundary between (). Such cells are called eukaryotic cells. Organisms with eukaryotic cells are called (). Some biological cells do not have formed cell nuclei, that is, cells and () are not coated, and there is no obvious boundary between () and (), Such cells are called prokaryotes. Organisms made up of prokaryotes are called ()
11. How to calculate 1.58 * 0.58 + 0.42 * 0.42 + 1.16 * 0.42 how to calculate 1.58 * 0.58 + 0.42 * 0.42 + 1.16 * 0.42
12. There are 600 pear and peach trees in the orchard, of which the number of peach trees is three times that of pear trees. How many pear trees are there?
13. There are chickens and rabbits in a farm. If the sum of the number of chickens and rabbits is 180 and the sum of the number of legs is 480, then chickens are better than rabbits
14. Compilation of key knowledge points in volume 4 and volume 5 Overall, it's better to be in order
15. The average of five consecutive natural numbers is 17. After adding two adjacent even numbers, the average is 21. What are the two even numbers?
16. PEP fifth grade volume I mathematics 120 page 2
17. Can you tell me about this fractional distortion X-Y (Y-X) squared ---- = --------- 5Y ( ) It's messy to write That is, X-Y of 5Y = what is the square of (Y-X)?
18. Fractional deformation 1、（1/3x+1/5y）/（2x-y） 2、（1/x）/（1/y） 3、（-a+b）/（a-b） 4、 x/y
19. On the transformation of proper fraction into partial fraction sum Q (x) = (x-x1 (x-x2) -- (x-xn), then, r(x)/Q(x)=A1(x-x1)+A2/(x-x2)----+An/x-xn) Where, how to use the undetermined coefficient method to find AI (I = 1,2,3,4, --)
20. The basic problem of solving several formula deformations (fraction) We need 10 courses. We must be basic, In a hurry in a hurry in a hurry in a hurry in a hurry Junior high school has a "formula deformation" class, that is to give a formula, let you deformation