PEP fifth grade volume I mathematics 120 page 2

3.5 / 2.5 = 1.4 how much is a kilogram of apple
1.4 * 1.6 = 2.24 how much is a kilogram of apples and oranges
2.24 * 3 = 6.72 how much is a 3kg orange
A: you should pay 6.72 yuan for oranges

RELATED INFORMATIONS

1. 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?
2. Compilation of key knowledge points in volume 4 and volume 5 Overall, it's better to be in order
3. 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
4. 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?
5. 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
6. The fifth grade mathematics book 125 pages 16 questions
7. 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!
8. [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 ()
9. 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?
10. 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
11. 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)?
12. Fractional deformation 1、（1/3x+1/5y）/（2x-y） 2、（1/x）/（1/y） 3、（-a+b）/（a-b） 4、 x/y
13. 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, --)
14. 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
15. First fraction addition and subtraction 1.(1/x＾3-1/x＾2)×x＾3/x-1 2.x/2-x-4-x＾2/x＾2-4x+4 3.x/x+1-x＾2+1/x＾2+x 4.2/a＾2-1+1/a+1
16. What is the law of fraction addition and subtraction? And the law of integer exponential power
17. The addition and subtraction of fractions (1) Given a + B = 3, ab = 1, then the value of a / B + B / A is () (2) If x
18. Add appropriate formula to keep the score unchanged A-B of a + B = A & # 178; - B & # 178; + a = a + 1 of C
19. =I want to solve some fraction problems in the second grade of junior high school ①(5mn²)^-3/（4m³n)^-2 ② (3 under 1-2 radical) ^ 0 - (2 ^ - 1) + | - 3| ③a^-2b²*(-2²b^-2)^-2/a^-4b²
20. Factorization of 2x ^ 2 + 2xy-y ^ 2