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The correct answer number of multiple choice questions is in brackets 406.06464…… The number is (), abbreviated as () A. Pure cycle decimal B. mixed cycle decimal C. 406. 06464 cycle
Is a pure cycle of decimals, do not cycle is not followed by an ellipsis, short 406.064 64 cycle
AC
Put the serial number of the correct answer in brackets
4. For the cylinder and cone with equal volume and equal base, the height of the cone is 18 cm, then the height of the cylinder is () cm
①54 ②18 ③6
5. The height of a cylinder is 4cm and its bottom area is 28.26cm
① Greater than 2 equal to 3 less than
\4、
The height of a cone is three times higher than that of a cylinder
So the height of the cylinder is 18 △ 3 = 6cm
Option 3
5. The height of a cylinder is 4cm, and the bottom area is 28.26cm
Radius × radius = 28.26 △ 3.14 = 9
And 9 = 3 × 3
So the radius is 3 cm 0
So choose 1
Put the correct answer number in brackets (Math Grade 5)
The greatest common factor and the least common multiple of 1.15 and 25 are ()
A. 5 and 50 b.15 and 50 C.5 and 75 d.15 and 75 D
2. For a room 50 decimeters long and 30 decimeters wide, it is more appropriate to choose square floor tiles with side length of () decimeters
A. 1 B.5 C.4 out of 6 d.8 out of 2
The sum of numerator and denominator is 10. The true fraction may be ()
A. 4 out of 5 B. 3 out of 7 C. 4 out of 6 D. 8 out of 2
Give me the answer
The answer is CBB
(choose the appropriate serial number to fill in the brackets)
According to a times b = C times D, the following can not form a proportion is ()
(A) A: B and D: B (b) d: A and B: C
(C) B: D and a: C (d) a: D and C: B
2. A and B go the same way. It is known that their speed ratio is 1 / 9: then the time ratio of a and B is ()
（A）9：10 （B）10：9
(C) 1 in 10: 1 in 9
3. There are two piles of coal, one third of which is used from pile a and one second from pile B. the remaining coal is exactly the same. The original weight ratio of pile a and pile B is ()
（A）3：2 （B）3：4
（C）4：3
ac
a
b
The calculation is carried out by using the sum of ten and borrowing ten
How to calculate
When calculating, it is necessary to observe whether there are several digits of some numbers that can be rounded up to a whole ten or a whole hundred. This is called rounding up ten method. When subtracting, if one digit is subtracted by one digit but not enough, it is necessary to borrow a ten from ten digits to subtract. This is called borrowing ten method
Xiao Ming did a problem, known two polynomials a, B, calculate a + B, he mistook a + B as A-B, the result of the answer is - 7 & # 178; + 10x + 12. If B = 4x & # 178; - 5x-6, then please help him calculate the correct result a + B
A+B=(A-B)+2B
=-7X²+10X+12+2(4X²-5X-6)
=-7X²+10X+12+8X²-10X-12
=X²
Xiao Huang does a question "known two polynomials a, B, calculate A-B". Xiao Huang mistakenly regards A-B as a + B, and the result is 9x2-2x + 7. If B = x2 + 3x-2, please help Xiao Huang find the correct answer of a-b
∵A+B=9x2-2x+7，B=x2+3x-2，∴A=9x2-2x+7-（x2+3x-2）=9x2-2x+7-x2-3x+2=8x2-5x+9，∴A-B=8x2-5x+9-（x2+3x-2）=8x2-5x+9-x2-3x+2=7x2-8x+11．
A classmate did a problem: "given polynomial a, B, calculate 2A + B
A classmate does a problem: "known polynomial a, B, calculate 2A + B"
If we mistakenly regard "2A + B" as "a + 2B", the result is 6x square - 2x + 5
Because a + 2B = 6x ^ 2-2x + 5, B = x ^ 2 + 3x-2
So a = 4x ^ 2-8x + 9
So 2A + B = 2 (4x ^ 2-8x + 9) + x ^ 2 + 3x-2
=9x^2-13xx+16
English translation
From that day on, we came together
Now I translate it by myself
Since then,we came together...
It's no problem for you to translate like that. But it's suggested to change the word "cam" to "got"!
No matter what happens
There are two kinds of Translation: whatever happens and no matter what happens
RELATED INFORMATIONS
- 1. (put the serial number in brackets) 1. The length, width and height of a cuboid are 5 decimeters, 4 decimeters and 6 decimeters respectively, and the sum of its edges is () A. 60 decimeters b.60 square decimeters c.120 cubic decimeters d.30 decimeters 2. A cuboid steel is 3 meters long and its cross-sectional area is 240 square decimeters. The volume of this steel is () A. 7.2 cubic meters b.7200 cubic meters c.7200 square meters d.72 cubic centimeters 3. Cut a cuboid which is 6 cm long, 5.2 cm wide and 4 cm high into the largest cuboid whose volume is () A. 64 cubic decimeter b.64 cubic centimeter c.216 cubic decimeter d.216 cubic centimeter 4. Place several cubic decimeter cubes into the smallest cube (excluding the case of only one cube). The volume of the cube is () A. 4 cubic decimeters B.6 cubic decimeters c.8 cubic decimeters d.16 cubic decimeters 5. A cuboid wooden box with a volume of (40 × 30 × 30) cubic centimeter can hold at most () cubes with an edge length of 1 decimeter A.30 B.36 C.40 D.36000
- 2. Choose (put the serial number of the correct answer in brackets) A bag of rice has 64 kg, if you eat 3 kg a day, enough to eat () days A.20 B.21 C.22
- 3. Fill in the number of the correct answer in brackets &The movement of elevator ③ Take photos &(4) projection slide ⑤ Paper cut Butterfly A. Translation B, rotation C, symmetry D, magnification
- 4. Choose words and fill in the blanks (only fill in the serial number of words) (A) The legend of (b) and the story of (c) 1. Fill in () in bracket a 2. Fill in () in bracket B 3. Fill in () in bracket C A. Jingwei reclamation B. grinding Xu Cheng Zhen C. Dayu water control D. digging canal E. Li Bing controls water F. dripping wears away stone g. Kua Fu pursues the day h. Yi shoots at the nine days The legends of () and () and the stories of () express the indomitable struggle spirit of Chinese people in ancient times
- 5. Choose words and fill in the blanks A pay attention B protect C obey D protect e keep () public order, () public security, () public property, () environment are the basic requirements of social morality
- 6. The problem of removing bracket and denominator It takes 11 hours for a ship to arrive at a place after 9 hours downstream from a place, and it takes 11 hours to return to a place according to the original route?
- 7. 1. If the square of (5-3a / 4) x + 5x-3 = 0 is a one variable linear equation about X, then a= 2. Fill a conical vessel with a bottom diameter of 30 cm and a height of 8 cm with water, and then pour the water into a cylindrical vessel with a bottom diameter of 20 cm and a height of 5 cm. Will the water overflow? Why? Please use the equation to solve the problem, which can only be solved once a dollar.)
- 8. A comprehensive problem of geometry plus algebra in the third year of junior high school Given that the four sides of a convex quadrilateral ABCD are a, B, C, D in order, and AA + AB AC BC = 0, BB + BC BD CD = 0, then the quadrilateral ABCD is () A. Parallelogram B. rectangle C. diamond D. trapezoid
- 9. Comprehensive problems of mathematical algebra a. B is the two real roots of the quadratic equation MX ^ 2 - (Mn + m + 1) x + 4N = 0 with respect to X. C and D are the two real roots of the equation 8y ^ 2 - (2m + 4) y + (5-N) = 0 with respect to y. if a and C are reciprocal to each other, B and D are reciprocal to each other, the values of M and N are obtained
- 10. Xiaoming saved 2000 yuan and 1000 yuan in two forms respectively, and took them out one year later. After deducting the interest income tax (interest × 20%), he could get 43.92 yuan of interest. It is known that the sum of the annual interest rates of these two kinds of savings is 3.24%, so the annual interest rates of these two kinds of savings are respectively 3.24%______ ．
- 11. 10 9 8 7 6 5 4 3 2 1 = 1 fill in the mathematical symbol in the brackets
- 12. 4. How to fill in 4, 5, 7, (), (), ()
- 13. Division calculation of rational numbers （-27）÷3 （-3.6）÷（）-2 （-9）÷3×（-3）
- 14. For a book by mail, the price of each book is a yuan, plus 10% of the book as the postage. For n books, the total amount is y yuan, then y = (), when a = 1.2N, n = 36, y value is ()
- 15. Multiplication problems of rational numbers in grade one mathematics 1. Connect 2, 3, 4 and - 6 into a formula by adding, subtracting and multiplying, and the result is 24, then the formula is () 2. Subtract 1 / 5 of - 2005, then subtract the remaining 1 / 6, then subtract the remaining 1 / 7. Then subtract the remaining 1 / 2005, and finally get () 3. If three integers a, B and C satisfy ABC = minus 24, then a + B + C has a maximum of (), a minimum of (), and an absolute minimum of () 4. Practical questions: there is a column of numbers. If the first number is negative, it can be multiplied by - 3 to get the next number; if the first number is positive, it can get the next number by subtracting 5. Now we know that the first number is 7. What is the number 2006 in this column?
- 16. What's the difference by subtracting 2 times of 4 / 5 from the reciprocal of 9 / 2?
- 17. What's the difference between the reciprocal of 5 and 6
- 18. Division of elementary dichotomy X ^ 2-4y ^ 2 / x ^ 2 + 2XY + y ^ 2 divided by X + 2Y / 2x ^ 2 + 2XY
- 19. I've heard that subtraction, multiplication and division can be converted into addition in computer. For example, subtraction can be multiplied by - 1. I want to know how to convert division
- 20. What knowledge did you learn about division by oral arithmetic in unit 6 of Volume 1 of grade 4