Hebei education printing plate sixth grade mathematics next semester examination questions one
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1. A computer can complete 7050640 calculations in 1 second. The number on the horizontal line is written as (), and the approximate number rounded to hundreds of millions is ().
2, 2.6 hours = () when () minutes, 0.55 cubic meters = () liters.
3. If four numbers -2.5, 1. 125,-and 2 are represented on the number axis, where () is farthest from the zero point.
4. Among 50 SARS patients in a certain area, 12 were medical personnel, accounting for ()% of the total infected people. The ratio of infected medical staff to other infected people is (): ()
5. Cut a section of cylindrical wood with a volume of 42.9 cubic decimeter into the largest cone, and the volume of the cut part is () cubic decimeter.
6. The scale of a map of China is 1: 4500000, and it is rewritten as a line segment with the scale of (). On this map, the distance from Nanjing to Beijing is 20.4 cm, and the actual distance from Nanjing to Beijing is () kilometers.
7. Saw the 5-meter-long steel bar into small pieces of equal length for 7 times, with each section accounting for () of the total length and each section being () meters long. If it is sawed into two sections, it takes 2 minutes, and it takes () minutes to saw into five sections.
8. For circles, rectangles and squares with equal perimeters, () has the largest area.
9. For cylinders and cones with equal volume and bottom area, the ratio of the height of the cylinder to the height of the cone is ().
10. There are nine ping-pong balls with the same appearance and color, and one of them is defective. Defective products are heavier than genuine products. Weigh with a balance at least () times to ensure that defective products are found.
1 1, the volume of a cone is 12 cubic decimeter, the bottom area is 3 cubic decimeter, and the height is ().
Second, please be a fair judge.
1. Buy apples and pears with the same weight, 7 yuan for apples and 5 yuan for pears, so the unit price ratio of apples and pears is 7:5. ( )
2. Original price of a children's coat 100 yuan. After the price is reduced by 20%, the price is increased by 20%. At this time, the price of this children's coat remains unchanged. ( )
3. Every natural number has its reciprocal. ( )
4. Of course, two triangles with equal areas can be combined into a parallelogram. ( )
5. Xiaoming said:? My cousin was born on February 29th. 1998. ( )
6. The base area of a cone is constant, and its height is inversely proportional to its volume. ( )
Third, sit in the right position.
1, in the plan view below, the symmetry axis is the most ().
A, rectangle b, square c, equilateral triangle d, sector
2. The following statement is incorrect ()
A, the square area is inversely proportional to the side length; B, the circle is an axisymmetric figure.
C, the square is a special rectangle D, draw a 4 cm long line segment.
3, a cylinder, if its bottom radius is expanded by 2 times and its height remains the same, then its volume is expanded by () times. a、6 B、2 C、8 D、4
4. The large trucks of the transportation team can transport 10 tons at a time, and the small trucks can transport 4 tons at a time, and the charges are 90 yuan. To transport 62 tons of goods at a time, the transportation team arranged different driving conditions, which was the most economical.
A, 6 large trucks, 1 minivan. Five big trucks and three small trucks.
C, 4 large trucks and 6 small trucks. D, 5 large trucks and 2 small trucks.
5. If =, the ratio of A to B ().
A, in direct proportion to B, in inverse proportion to C, out of direct proportion
Fourth, please calculate.
1, what can be simplified should be simplified.
( )? 7? five
7.89? 16.5+2 1. 1? 1.65 5 1 1 ? [(25 + 13 )? 56 ]
2. Solve the ratio or solve the equation.
2- 15 x = 1225 35:67 = x:54
Fifth, solve the problem.
1. On a map with the scale of 1:2000000, the distance between Party A and Party B is 6 cm. How many hours does it take for a car to drive from A to B at a speed of 80 kilometers per hour?
2. Is the school celebrating? New year's day? A singing contest was held. There are 48 contestants. The organizing Committee is going to award the first prize to the contestants, and the rest won the second and third prizes with 3: 4 points. How many people won the first, second and third prizes respectively?
3. Cast a cylindrical iron block with a bottom circumference of 3 1.4 decimeter and a height of 9 decimeters into a cone with a bottom radius of 6 decimeters. What is the height of the cone?
4. The construction team can build a canal and work 5 hours a day, 18 days, if the work efficiency remains unchanged. Working 6 hours a day, how many days can you finish the task ahead of schedule?
5. Make a rectangular frame with 24-decimeter-long iron wire, so that the ratio of length, width and height is 5:4:3. How many square decimetres of paper does it take to stick a layer of paper outside this rectangular frame?
Hebei education printing plate sixth grade mathematics next semester examination questions two
First,? Believe in your ability! ? Please be patient. (20 points for this question * * *, 65438+ 0 points for each space)
1, 200.3 million write (), adapted for use? Wan? Unit number is (), omit? Billion? The mantissa at the back is probably ().
2, a cake is 2 Jin, which is distributed to 10 children on average. Each child gets () pieces of cake, the weight of which is () kilograms.
3. Go south for 200 meters and mark it as +200 meters, then -350 meters is ().
4.0.006 kg = () g 2. 15 hours = () hours () minutes.
5 liters 9 ml = () cubic decimeter 980 square decimeter = () square meter.
There are 48 students in Class 6 (1) today, and two of them are on leave due to illness. The attendance rate of students in Class Six (1) today is ().
7. It takes 12 minutes to saw a piece of wood into four sections. At this rate, it will take () minutes if it is to be sawed into six sections.
8. Cut the largest circle from a square paper with a side length of 20 cm. The area of this circle is () square centimeters.
9. From City A to City B, it takes 3 hours by truck and 4 hours by bus. The shortest time ratio between trucks and buses is (), and the shortest speed ratio between trucks and buses is ().
10 The bottom area and volume of the cylinder and the cone are equal, respectively. The height of the cone is 1.8 decimeter, and the height of the cylinder is () decimeter.
Second, please give a sentence. What do you think is right? Please put brackets around each question. , the type is wrong? . (8 points for this question * * *, 65438+ 0 point for each space)
1 and calendar years that are multiples of 4 must both be leap years. ( )
2. The circumference of a semicircle is half of the circumference of the circle in which it is located. ( )
The reciprocal of a number is not necessarily less than this number. ( )
If two straight lines are parallel, they must be on the same plane. ( )
5. One ton of coal is 40% used, leaving 60% tons. ( )
6. Add 0 or remove 0 after the decimal point, and the size of the decimal point remains unchanged. ( )
7, a cuboid, its length, width and height expand 2 times, and its volume expands 6 times. ( )
8. Put five apples in three drawers. There must be at least three apples in at least one drawer. ( )
Third, please choose carefully. Fill in the brackets with the serial number of the correct answer. (5 points for this question * * *, 65438+ 0 point for each space)
1, observe a 30-degree angle with a magnifying glass with a magnification of 100, then the observed angle ().
A, size unchanged b, reduced 100 times c, enlarged 100 times.
2. The degree ratio of three internal angles of a triangle is 2:3:5, and this triangle is ().
A, acute triangle b, obtuse triangle c, right triangle
3. Is a natural number greater than 10, and the minimum of the following scores is ().
A, B, C,
4, a commodity, the original price of 600 yuan, is now sold at a 10% discount, and the current price is cheaper than the original price ().
A, 530 yuan B, 40 yuan C, 60 yuan
5, with a 200 cm long wire around the following graphics, the largest area is ().
A, square b, circle c, rectangle
Fourth, believe in you? Computing skills? . Please calculate it carefully. (This question ***32 points)
1, directly write the number of the following questions. (8 points for this question * * *, 65438+ 0 points for each small question)
2. Calculate the following questions (simplify them if you can). (This question *** 12 points, 3 points for each small question)
3. Solve the ratio or solve the equation. (This question ***6 points, each empty = small question 3 points)
4, column comprehensive formula or equation calculation. (6 points for this question * * *, 3 points for each blank)
What is the product of (1) 10 and 3.5 divided by 0.7 and multiplied by 0.2? (Column synthesis formula)
②4.32 means that 6 is less than 60% of a number. What's this number? (Equation solving)
Verb (short for verb)? Use your wisdom? Please explain carefully. (25 points for this question * * *, 5 points for each small question)
1. On the map of scale, the distance between A and B is 2.4 cm. What is the actual distance between a and b?
2. There are 180 pear trees in Limin Orchard, among which there are more apple trees than pear trees. How many apple trees are there in the orchard?
3. The current price of a mobile phone is 1200 yuan, which is lower than the original price by 400 yuan. What percentage?
4. The distance between Port A and Port B is140km. It takes 4.5 hours for a ship to sail from Port A to Port B, but it takes 1 hour more than when it goes back. What is the average speed of the ship?
5. A workshop produced a batch of 900 TV parts, which was completed in group A 12 days and group B 18 days. First, group A worked for 7 days, and the remaining two groups cooperated. How many days will it take?
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