Sixth grade second volume mathematics midterm examination paper topic
First, multiple-choice questions (***5 points)
1, processed a batch of parts, and after inspection, 100 was qualified, 25 was unqualified, and the qualified rate of this batch of parts was ().
a、75% B、80% C、 100%
2. If the number A is 25% more than the number B, then the number B is the number A ().
a、75% B、80% C、 125%
3. Put 5 kilograms of sugar into 95 kilograms of water, and the sugar content of sugar water is ().
a、5% B、4.8% C、 15%
4, the construction team plans to build a 50km long highway, 35km has been built, the rest () has not been repaired.
a、70% B、75% C、30%
5, to make a cylindrical oil drum, at least how much iron to make it ()
A. Surface area B. Transverse area C. Volume
Second, judge. Please enter the correct answer on the answer sheet. Please make a mistake on the answer sheet? (***5 points)
6,20% is the same size as a kilogram and has the same meaning. ( )
7. The volume of a cone with a bottom radius of 6 cm is equal to the volume of an outline cylinder with a bottom radius of 2 cm. ( )
8. The radius of the bottom surface of the cylinder is doubled, the height is reduced to half, and the volume is unchanged. ( )
9. The price of a commodity first rises by 10% and then falls by 10%, and the commodity price remains unchanged. ( )
10, the cylinder has countless heights and the cone has only one height. ( )
3. Fill in the blanks (***24 points, 65438+ 0 points per grid)
1 1、8 :5=( )? () = ()% = () decimal
12, 4 tons of peanuts were used to extract oil, and the oil yield of peanuts was ().
13, 42% of a project has been completed, and ()% has not been repaired.
14, the height of a cylinder expands 3 times, and the radius of the bottom surface remains unchanged, then the volume of the cylinder expands () times; If the height of the cylinder remains the same, the radius of the bottom surface will be expanded by 3 times, and the volume of the cylinder will be expanded by () times.
15. The radius of the bottom surface of the cylinder is 2cm and the height is 10cm. Its side area is (), its surface area is () and its volume is ().
16. Divide a cylinder into several equal parts along the diameter (as shown in the figure) and make it into an approximate cuboid. Approximate cuboid, 2 cm wide and 5 cm high. The volume of this cylinder is () and the side area is ().
17, a piece of wood with a length of 10 meter, parallel to the bottom, is divided into two sections with the same length, resulting in a surface area.
Increased by 6.28 square meters, the original volume of this wood is ().
16 thematic map 17 thematic map
18, the price of a computer is 3600 yuan, which is 80% of the selling price. The actual selling price is () yuan.
19, number a is 20, number b is 16, number a is ()% of number b, number b is ()% of number a, number a is ()% more than number b, and number b is ()% less than number a.
20. Cut the cylinder with the volume of 18.84 cubic meters into the largest cone. The volume of the cone is (), and the volume of the cutting part is ().
2 1, among 0.85, 85. 1% and 87.2%, the maximum number is () and the minimum number is ().
Fourth, calculation. (***35 points `)
22. Write numbers directly (8 points)
① 10? 10%= ②56%-28%= ③ 1+0.5% =
④ 1-0.5% = ⑤ 1? 1% = ⑥ 1-98% =
⑦3+ 150% = ⑧ 15%? 75% =
23, solve the equation (9 points)
①65% X+25% X = 2.7②X-20% X =③( 1+2.5%)X = 16.4
24, calculation (18 points)
① ? -25%? ② ( 1- ? )?
③ 85? + 15? 75% ④ 2.7? (4-82%- 18%)
⑤ [ 1-( ? )]? ⑥ 0.55? 8-60%
5. Calculate the volume below. (8 points)
Six, solve the problem (23 points) (27-28 questions each 4 points, the rest of each question 5 points)
27. The construction team has built a 25-km-long highway, which has now been completed 18km. What percentage of the total length has been built?
28. The inner diameter of the tap water pipe is 2 cm, and the flow rate of water in the pipe is 8 cm per second. A classmate turned on the tap and forgot to turn off the tap after washing his hands. How many liters of water will be wasted in five minutes? (Keep integer)
29. There is a conical tent with a base diameter of about 6m and a height of about 4m. How many square meters does it cover? How much space does it occupy?
30. A grain depot with a cone on the top and a cylinder on the bottom (as shown below). If each cubic meter of grain weighs 600 kilograms, how many kilograms of grain can this grain depot store?
3 1. A rectangular square steel with a length of 12 cm, a width of 3. 14 cm and a height of 2 cm was cast into a conical billet with a base diameter of 8 cm. What is the height of this cone blank?
Answers to midterm questions in the second volume of sixth grade mathematics
First, multiple choice questions
b； b； a； c； A
Second, the judgment,
?
Third, fill in the blanks
1 1、 8; 5; 10 ; 160; 1.6
12、 40%
13、 58%
14、 3 ; nine
15、 125.6cm？ ; 150.76cm？ ; 125.6cm？
16、62.8cm？ ; 62.8cm？
17、3 1.4m？
18,2880 yuan
19、 152%; 80%; 25%; 20%
20, 6.28 meters? ; 12.56m？
2 1, 7/8; 0.85
Fourth, calculation
22、 1; 0.28; 1.005; 0.995; 100; 0.02; 4.5; 0. 1 125;
23. Solve equations ①, ③, ③, 16.
24. Calculate ①, a quarter ②, an eightieth ③, 75 ④, 0.9 ⑤,1/46.3.8.
5. Calculate the volume below.
25. 100.48
26. 1 13.04
Sixth, solve the problem.
27.、 18? 25=72%
28, 0.8 liters
29、.37.68
30.、 18840kg；