People's education press fifth grade volume I mathematics textbook page 72 application question 4 how to do. Ask you a favor. In the afternoon Six pop cans and nine beverage bottles, each of which costs the same. The total price is 1.5 yuan. How much is each? Do it by solving the equation. seek

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1. 2 / 3, 8 / 9, 2 / 3, 4 / 3, 2, (), fill in a number in the bracket to make the sequence hold,
2. Y = [the square of (x1-x) plus the square of (x2-x) plus the square of x3-x] divided by 3
3. A measuring cylinder containing 280 ml of water. After placing a glass marble, the water surface rises to 300 ml. the volume of this glass marble is______ ．
4. How to write the last question on page 11
5. The sum of three consecutive even numbers is 3A (a is not equal to 0), where the largest is (), and the smallest is ()
6. The first unit of mathematics in the seventh grade
7. There are 100 chickens and rabbits in total, and the number of legs of chickens is 30 less than that of rabbits. How many of them are there? It's 28 less
8. The fourth grade of primary school mathematics for the next semester
9. Simple calculation of 8 / 13 / 7 + 1 / 7 * 6 / 13
10. What's the answer to the second question on page 68 of volume two of grade four? There is a square flower bed in Dongshan primary school. When the campus was built, the opposite sides of the flower bed were increased by 3 meters each. In this way, the flower bed became a rectangle, with an area of 24 square meters more than the original. How many square meters was the original flower bed My answer was 64, but the child came back and said that the teacher's answer was 16. The teacher made an article on "a group of opposite sides" and "each side". That is to say, the two ends of the original square were extended by 3 meters. The calculation result was 16 square meters. Our parents didn't know which answer was right
11. Sequence 2, 6, 12, 20, 30, 42 What's next?
12. After rain, the sky and the earth are more like filtered, especially fresh Correct the wrong sentence
13. Uncle Li's family has 42 chickens, half of which are ducks. How many chickens and ducks do Uncle Li's family raise?
14. Which word is the instrument of measurement or calculation And what's the word "hear" or "hear"
15. What are the common factors of 64 and 45 Yes!
16. English translation
17. Observe the following three lines: - 3, 9, - 27, 81, - 243 -5，7，-29，79，-245，… -1，3，-9，27，-81… (1) What is the order of the first row? (2) What is the relationship between the number of the second and third rows and the number of the first row? (3) Take the 10th number of the three rows and calculate the sum of the three numbers
18. The problem of increasing and decreasing functions and the problem of odd and even functions The definition field of y = f (x) is R. for any a, B belonging to R, f (a + b) = f (a) + F (b). When x > 0, f (x) < 0 holds, f (3) = - 3 1) It is proved that the function is a decreasing function over R 2) Prove that a function is an odd function 3) Functions in [M, n] m, n all belong to the range of n *
19. Odd function + non odd non even function=_______ Even function + non odd non even function=_______ Non odd non even function + non odd non even function=_______ Non odd non even function × non odd non even function=_______
20. Let a be an even function and B be an odd function, then the sum difference product quotient of a and B, the sum difference product quotient of a and a, and the sum difference product quotient of B and B are odd or even functions respectively? Even + - odd =? (even or odd) even × / odd =? (even or odd) Even + - even =? (even or odd) even × / even =? (even or odd) Odd + - odd =? (even or odd) odd × / odd =? (even or odd)