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1、 Use a 20 cm long and 12 cm wide rectangular piece of paper to form a cylinder as large as possible. The circumference of the bottom surface of the cylinder is () cm and the height is () cm. This piece of paper can also form a cylinder with the circumference of the bottom surface of the cylinder is () cm and the height is () cm. The side area of the cylinder is () square cm 2、 A square iron block with an edge length of 5 cm and a rectangular iron block with a length of 9 cm, a width of 7 cm and a height of 3 cm are fused to form a cylinder hammer. The diameter of the bottom surface of the hammer is 20 cm and the height is () cm
1、 Use a 20 cm long and 12 cm wide rectangular piece of paper to form a cylinder as large as possible. The circumference of the bottom of the cylinder is (20) cm and the height is (12) cm. This piece of paper can also form a cylinder with the circumference of the bottom of the cylinder is (12) cm and the height is (20) cm. The side area of the cylinder is (...)
RELATED INFORMATIONS
- 1. After a cylinder is cut into an approximate cuboid, the bottom area of the cuboid is equal to that of the cylinder________ The height is equal to the height of the circle_________ Because the volume of a cuboid is equal to_______________ So the volume of the cylinder is equal to_____________ The calculation formula of the volume of a cylinder expressed in letters is_______________ .
- 2. Fill in the blanks of mathematics in Grade 6 of primary school Cut the cube with the edge length of 1 decimeter into several small cubes with the edge length of 1 centimeter (no waste), and arrange the small cubes into a row to form a cuboid. The surface area of the cuboid is () square centimeter Give 10 points to those who tell you their ideas
- 3. (1) The number of white rabbit is one sixth less than that of black rabbit. The number of white rabbit is that of black rabbit, that of black rabbit is that of white rabbit, that of black earth is more than that of white rabbit, and that of black rabbit is that of black rabbit (2) Two fifths of a glass of fruit juice has been drunk, and what is left is what is left Big brother, big sister Be more specific and explain how you do it!
- 4. Why doesn't translation change the size of the graph?
- 5. Translation does not change the shape______ ．
- 6. What is the edge line of the figure (the math problem of grade three in primary school requires drawing some edge lines of the figure)
- 7. Sixth grade math graphics with answers 40 (with map) urgent! Hurry up! It's better to be simple
- 8. As shown in the figure, in rectangular ABCD, be bisects ∠ ABC intersects ad at point E. if ∠ EBO = 15 °, calculate the degree of ∠ AOE
- 9. To measure the diameter of a small hole on a steel plate, an indirect measurement method is usually used. If a standard steel ball with a diameter of 10 mm is placed on the small hole, the distance between the top of the steel ball and the plane of the small hole H = 8 & nbsp; mm (as shown in the figure), and the diameter D of the small hole is calculated
- 10. How do you want to rotate a figure with a point in the triangle,
- 11. 1. There are () different ways to choose a chief monitor and a deputy monitor from the four children. 2. There are () different ways to choose a piece of cloth in red, blue and yellow?
- 12. 12.5% less than 400kg is () kg, 12.5% more than 400kg is () kg, 30 less than 40 is () kg
- 13. ）. The sum of all divisors is () The decimal point of a decimal, move one place to the right, 5.4 larger than the original, the original number is () A natural number divided by 2, 3, 4, 5, the result is more than 1, such a number has (), the smallest is () The letter expression of the relationship between fraction, division and ratio is () The number of a is three eighths of the number of B. the ratio of a to B is (). The number of a is three eighths more than that of B. the ratio of a to B is () () divide by () = 3 / 4 = () = (): () = () 12 / 4 = ()% The side length of a square is ()% of the circumference This year's per capita income is 12% higher than that of last year, so this year's per capita income is ()% This year's per capita income is 12% higher than last year's, so this year's per capita income is ()% of last year's
- 14. 1. The lift is a () phenomenon 2. On clocks, the rotation of the hour hand and minute hand is () phenomenon It's the second volume of grade 6 published by Chenguang Publishing House of Yunnan publishing group company It's better to have an answer on pages 54 to 57,
- 15. Help me out 10 simple fill in the blanks about the knowledge I have learned in the first volume of grade 6. Write out the answers
- 16. Poplar is 2 / 9 of willow, and poplar is a fraction of willow A road has been built 4 / 15 of its total length, and what has been built is a fraction of what has not been built A shoe store sold shoes of various sizes last week (table below) Size 21.5 22.5 23 23.5 24 Quantity 10 24 56 34 12 8 In your opinion, this shoe store should buy more shoes of size () The following is a book read by several students. 558 9 10 13 30 40 (median / mode / average) is suitable to represent the general level of the book
- 17. 60：40=（）/（） 0.5：0.4=（）/（） If the product of two inner terms of a proportion is the smallest prime, one outer term is 3, and the other outer term should be () Judgment: Because 3x = 7Y, so x: y = 7:3 ()
- 18. 1. If a = - 0.3 ^ 2, B = - 3 ^ - 2, C = (- 1 / 3) ^ - 2, d = (- 1 / 3) ^ 2, then the size relationship of a, B, C, D is________ . 2. If 6 / 7 = 6 (5a + 2) / 7 (5a + 2), then the value range of a is_______ .
- 19. (1) In the quadratic equation of one variable: the square of X + BX + C = 0, if the coefficients B and C can be taken in 1,2,3,4,5,6, then the number of equations with real number solutions is [?] (2) If x satisfies the square of X - 3x + 1 = 0, then the value of X + (1 / x) is [?]
- 20. 1. If x ^ 2 + 3x-1 = 0, then x-3 / 3x ^ 2-6x ^ (x + 2 - 5 / X-2)=________ . 2. If M / A ^ 2-B ^ 2 - 2ab-b ^ 2 / A ^ 2-B ^ 2 = A-B / A + B, then M=_______ .