1 divided by 3, 4 and 5 between 1 and1-2000 is * * * ().
2. For a band fraction, the numerator of the fraction is 13. After becoming a false score, the numerator is 58 and the qualified score is ().
3, from the four numbers of 0, 2, 6 and 7, choose non-repeated numbers to form three digits divisible by 6. If these three numbers are arranged in descending order, then the sixth number is ().
4. The radius of the bottom of the cone is the radius of the bottom of the cylinder, and the volume of this cylinder is the volume of the cone. The ratio of the height of this cone to the height of the cylinder is ().
5. 12 workers can produce 72 parts in 0.4 hours. According to this calculation, it takes () hours for 15 workers to produce 180 parts.
6. The divisor of18 is (). Choose two odd numbers and two even numbers from these numbers to form a ratio ().
7. For a fraction, the sum of numerator and denominator is 37. If the numerator subtracts 1, the value of this fraction becomes, and the original fraction is ().
8. Glue three cubes with a length of 2 cm together to form a cuboid. This cuboid has a surface area of () and a volume of ().
9. Every small square on the right is 1 cm2.
The area of the shaded part is ()
10, one set, comparative size: a b.
Two, true or false (4 points)
1, 3, 4 and 5 are all prime factors of 60. ( )
2. The sum of two adjacent natural numbers must be odd. ( )
3. Proportion is the ratio of the previous paragraph to 1. ( )
4. The side length and perimeter of a square are in direct proportion. ( )
Three, multiple choice questions (8 points)
1, a divided by b, the quotient is 0.4, and the simplest integer ratio of a and b is ().
a、 1:0.4 B、0.4: 1 C、5:2 D、2:5
2. The length of a rectangle is a cm and the width is b cm. If the length and width are increased by 1 cm, the area cannot be increased by () square cm.
a、 1 B、a+b C、a+b+ 1 D、ab
3. As shown in the figure below, the height of the parallelogram is 6 cm and the area is () square cm.
A, 35 B, 42 C, 30 D, uncertain
4. Divide the circle into two parts (A and B) as shown in the figure.
Two points are two endpoints on the diameter), then these two parts
Compare ()
A, the perimeter is equal, and B, the area is equal.
The week of C and A is longer, and the area of D and A is larger.
Fourth, calculation
Five, graphic questions
1. All triangles on the right are isosceles triangles. Given AB = 10.8cm, find the area of the shadow part.
2. Find the area of the shaded part in the figure. (Unit: cm)
Sixth, solve the problem.
1, only column types are calculated, not calculated.
(1) There is a pile of coal, which was transported for the first time, 80 tons for the second time, 75% for the first time, and there is 10 tons left. How many tons is this pile of coal?
(2) After the 63cm long cylinder is cut into two small cylinders according to the ratio of 7: 3, the surface area is increased by 6cm. What is the volume difference between the two cylinders?
(3) In the fourth grade of experimental primary school, 60% students subscribe to Youth Daily and Science and Technology News, while 14 students subscribe to both newspapers, and 2 students do not subscribe to both newspapers. How many people are there in the fourth grade?
2. The output statistics of a cement plant from 200/kloc-0 to 2004 are as follows:
(1)200 1 By 2004, the total output of cement was () ten thousand tons.
(2) The average annual output is () ten thousand tons.
(3) From this statistical chart, try to analyze the production situation of this factory. Do you predict how many million tons the total output will be in 2005?
3. How much does it cost to sell a commodity at a profit of 13 yuan per piece in 7 yuan and as much as 12 yuan per piece in 23 yuan?