1 and 70305880 are read as () and rewritten as? Wan? The unit number is (), and the mantissa after omitting ten thousand digits is about ().
2.20 10 year 16 Guangzhou Asian Games will be held on 2010/3165438+127 October, so the Asian Games will last more than () weeks.
3.218: The ratio of123 to the simplest integer is (), and the ratio is ().
4、3? ( )=( )? 24= = 75% = () times.
5. As shown in the figure, the radius at the bottom of the cylinder is (). Put this circle.
The edge of the column can be expanded into a rectangle. This rectangle
The area is (), and the volume of this cylinder is ().
(What is pi? )
10cm
6、 = , = ,
7. 1 kg brine contains 50 grams of salt, which is ()% of brine.
8, 7 and 8 can be divisible by 2, 3 and 5 at the same time. Only one digit can be filled with (), and at most, one digit can be filled with ().
9. The ratio of boys to girls in a school is 4: 5, and the number of girls is ()% more than that of boys.
10. The distance between two maps in a city map is 10cm, which means the actual distance is 30km. The scale of this map is ().
2. True or false questions: (* * * 5 points for each question, 1 point)
1, natural numbers (except 0) are either prime numbers or composite numbers. ( )
2. Only three-fifths of the scores are less than four-fifths and more than two-fifths. ( )
The height of cylinder and cone is the same, and the sum of their volumes is 36 cubic meters, so the volume of cone is 9 cubic meters. ( )
4. Of the 90 parts produced, 10 is rejected, and the qualified rate is 90%. ( )
5、? Frog has four legs, two eyes and a mouth; Two frogs with eight legs, four eyes, two mouths and three frogs? So the number of frogs is proportional to the number of legs? ( )
Iii. Multiple choice questions: (5 points for each question, 1 point)
1, 20 1 1 year, 1 month, with * * * days in February and March.
A.89 B.90 C.9 1 D.92
2. Divide a parallelogram into two trapeziums at will, where () is always equal.
A. Height B. Sum of upper and lower bottoms C. Perimeter D. Area
3. The rectangle is 5cm long and 3cm wide, indicating the score of ().
A. length is greater than width B. length is less than width C. width is less than length D. width is greater than length.
4. When the numerator of a fraction decreases by 3 times and the denominator increases by 3 times, the fractional value decreases by () times.
A.3b.6c.9d remains unchanged.
5. The following x and y are inversely proportional ().
A.Y =3+ X B.X+Y= 56 C.X= 56 Y D.Y= 6X
Four, calculation questions: (***35 points)
1, a number written directly. (65438+ 0 point for each question)
26? 50= 25? 0.2= 10-0.86= 24? =
? 3= 125%? 8= 4.8? 0.8= 8? =
12? ( + )= 1- 1? 9= 2.5? 3.5? 0.4=
2. Off-mold calculation. (2 points for each question)
0.25? + 2.5% 9.6- 1 1? 7 + ? four
3. Solve the ratio and equation. (3 points for each question)
5.4+2X = 8.6 2.5:5 = x:8
0.2 = 1- X24
4. Column calculation. (4 points for each question)
(1) 180 is more than 50% of 10. What's this number?
(2) What is the product of the quotient of 0.15 divided by 5 and multiplied by 5?
Verb (abbreviation of verb) problem solving: (***34 points, 4 points for the first 7 questions, and 6 points for the eighth question)
1. The motorcade delivered a batch of relief materials to the disaster area, traveling at a speed of 80 kilometers per hour and reaching the disaster area in five hours. When I come back, I will drive at the speed of 100 km per hour. How long will it take for this team to return to the starting point?
The bookstore has a set of popular science books in 96 yuan at the original price, which are now sold at a 60% discount. How much cheaper can I buy a set? If you buy 6 sets, will 360 yuan be enough?
3. I hope there will be 120 in grade five and 135 in grade six. These two grades account for the total number of students in the school. How many students are there in the school?
The car factory planned to assemble 4000 cars in 25 days, which was actually completed five days ahead of schedule. How many cars are actually assembled every day on average? (Equation solving)
5. A rectangular glass fish tank (there is no glass at the top of the fish tank), which is 5 decimeters long, 3 decimeters wide and 3.5 decimeters high. How many square decimetres of glass does it take to make this fish tank?
6. Find out the area of the shaded part in the picture below. Unit: meter (? Take 3. 14)
7. A cylindrical glassware with a bottom radius of 6 cm contains some water, and a conical plumb hammer with a height of 9 cm is immersed in the water. When the plumb hammer was taken out of the water, the water level dropped by 0.5 cm. How many square centimeters is the bottom area of this cone? (? Take 3. 14)
20 17 junior high school mathematics examination paper (2)
Fill in the blanks. (25 points)
1, a number consists of 9 1000, 6 1, 7 0. 1 and 4 0.0 1. This number is written as (), the decimal point is removed, and the number is expanded to () times the original number.
2. When130min = (), 50.7m3 = () liter.
3. In 1- 10, () is both a composite number and an odd number, and () is both an even number and a prime number.
4. The decimal unit is (), which has a decimal unit like (), and the decimal unit like () is the natural number unit.
5、A=2？ 3? 5，B=2？ 2? 3? 7. The greatest common factor of numbers A and B is (), and the smallest common multiple is ().
6. If m is an even number, then 5m must be (). (fill in? Strange? Or? Even? )
7. In the basketball game, losing one ball is marked as -2, losing two balls is marked as (), and +6 means ().
8. Cylinders and cones have equal volumes, and the ratio of their bottom areas is 3:4. The height of the cylinder is 12 cm, and the height of the cone is () cm.
9. Xiaoming was studying under the lamp at night when the power went out suddenly. He pulled the switch six times in a row. When the call comes in, the light is in () state. (? Open? Or? Close? )
10, a rectangular carton, measured from the inside, 40 cm long, 26 cm wide and 20 cm high. Use it to hold small cubes with a side length of 4 cm, and at most () such cubes can be held.
1 1 and: 8 The simplest integer ratio is (), and the ratio is ().
12, the number of boys in a school is 20% more than that of girls, and the number of boys is the number of girls ().
13, it takes 3 minutes to saw a steel bar in two and () minutes to saw it in three.
14, the degree ratio of three internal angles of a triangle is 1:2:3. According to the angle, it is a () triangle.
15. Cut a cube with a side length of 1 decimeter into cubes with a volume of 1 cubic centimeter, and then put these cubes together to grow into the largest cuboid with a length of () meters.
16, brother and sister go from home to school, it takes 8 minutes for elder sister and 9 minutes for younger brother, and the speed ratio of brother and sister is ().
Second, the judgment question. (5 points)
1, the number A is greater than the number B, and the number B is less than the number A .. ()
2. To make a big cube from a small cube with a side length of 1cm, at least eight such small cubes are needed. ( )
3. The coprime of two numbers has no greatest common factor, only the smallest common factor. ( )
4. The area of triangle is constant, and the base is inversely proportional to the height. ( )
5. The radius of the cone bottom surface is enlarged by 5 times, and the volume is enlarged by 25 times with the same height. ( )
Third, multiple choice questions. (5 points)
1, reflecting the percentage of total household expenditure, and you can choose () statistical chart.
A, horizontal bar b, dotted line c, fan-shaped
2. When the salt content in a glass of salt water is 5%, the mass ratio of salt to water is ().
a、 1: 19 B、 1:20 C、 1:2 1
Bright primary school used 25 tons of water in May, 5 tons less than that in April. What percentage was saved? The column type is ().
a、5？ 25 B、5？ (25+5) C、5？ (25-5)
4. The number of A is equal to 75% of the number of B, and the ratio of A to B is ().
a、8:9 B、9:8 C、 1:2
5. The diameter of the semicircle is d and the circumference is ().
A: d B? d？ 2 C 、? d？ 2+d
Fourth, the calculation problem. (30 points)
1, a number written directly. (4 points)
0.25? 4= -0.2= 6.4? 8= +0.4=
77? = ? 1.8= 125? 8= ? =
2. Use your favorite method to calculate. (12)
(7.5+2.5)? 0.25 [ 1-( ? )]? 36? + ? 3? - ? three
3. Solve the equation. (6 points)
x- x= 14 8x+5？ =84
4. Column calculation. (8 points)
(1) The sum of twice a number is 90. Find this number.
(2) What is the quotient of the sum of1divided by their difference?
Five, painting questions (4 points)
1. Enlarge the triangle in the figure below by 2: 1.
2. Draw two triangles with the same base and the same height with parallel lines.
Sixth, the application problem. (3 1)
1, only column types are not counted (6 points)
(1) There are 500 peach trees in the orchard, and there are 250 fewer apricot trees than peach trees. How many apricot trees are there?
(2) Xiao Li bought a national construction bond with a fixed term of 3 years and an annual interest rate of 3. 14%. How much can he get when it expires?
(3) Plan
Is 1500 km more practical than planned? kilometre (km)
2, column and answer (25 points)
(1) I read a book on the first day, and I read 8 pages more than the first day the next day, leaving 120 pages unread. How many pages are there in this book?
(2) On the map with the scale of 1:8000000, the distance between the two places is 6 cm. What is the actual distance between the two places?
(3) The length of a rectangle is 8 cm and the width is 6 cm. A three-dimensional figure is obtained by rotating around its length. What is the volume of this number in cubic centimeters?
(4) Two cars, A and B, set off from two places at the same time, moving in opposite directions, and met after 2.5 hours. Car A travels 60 kilometers per hour and car B travels 45 kilometers per hour. How many kilometers are there between these two places?