2.43, 54 and 67, the number of is (), and the smallest number is ().

3. Divide the 4-meter-long iron wire into five sections on average, each section is () meters long and each section is () meters long.

4. Among the numbers 27, 37, 4 1, 58, 6 1, 73, 83, 95, the odd numbers have (); Even numbers have ();

Prime numbers have (); The composite number has ().

5、9÷ 15=()60=27()=()÷5

6. Biscuits 15 boxes, of which four boxes have the same quality, and a few pieces are missing from one box. How many times can you find this box of biscuits if you can weigh it with a balance?

7.8.04 cubic decimeter = () liter = () milliliter

7.5 liters = () cubic decimeter = () cubic centimeter

8. Splice three small cubes with a side length of 2cm into a cuboid, and the surface area of the cuboid is less than the sum of the surface areas of the three small cubes () square centimeters.

9. To make a cuboid 5 cm long, 4 cm wide and 4 cm high, at least () cubic centimeters of wood is needed. If you want to draw the surface of a cuboid block, the drawing area is () square centimeters.

10, the surface area of a cube is 150 square decimeter, and the volume is () cubic decimeter.

1 1. From 3 pm to 9 pm, the clock turned clockwise () degrees.

The prime factor of 12 and 48 is ().

Second, judgment.

1, any nonzero natural number has at least two factors. ()

2. Because the numbers 33, 36, 39, 63, 69, 93, 156 can all be divisible by 3, the numbers with 3, 6 and 9 can definitely be divisible by 3. ()

3. The greater the denominator of a score, the greater the unit of the score. ()

4. All even numbers are composite numbers. ()

5. The smallest prime number is 1. ()

When the side length of a cube is expanded to 4 times, its volume is expanded to 64 times. ()

After the numerator of 7.7 10 is multiplied by 2 and the denominator is added with 10, the fractional value remains unchanged. ()

8. The numerator of a false score is greater than the denominator. ()

9. A watermelon ate 23, and there were 43 left. ()

Third, choose

1. When a is equal to (), the product of 17a is a prime number.

A, 1B, 17C, not necessarily.

2. A two-digit number that is both an even number and a prime number, and a ten-digit number that is neither a prime number nor a composite number is ().

a、32B、 16C、 12

3. The factor of the composite number is ().

One, countless B's, two C's, three or more.

4. Among the following numbers, the odd number and the composite number are ().

a、 13B、36C、 15

5. Among the scores of 5 12, 1725 and 735, () can be converted into finite decimals.

a、 1B、2C、3

Four, calculation (23 points)

1, number of direct writes: (3 points)

56- 16= 12- 14=7 10+3 10=

1-34= 12-5 10= 13- 19=

2. Calculate the following questions, which can be simplified (12 points)

45+( 1 1 15+3 10)38+47+586-(34-25)4 15+79-4 15+29

3, solve the equation (8 points)

5X-3X= 1237+X=34

79-X=427X-5 12=38

5. Calculate the total side length, surface area and volume of the cuboid below: (unit: cm)

elegant

Six, solve the problem (28 points)

1. Li Ming surrounded a triangle with a 1 meter-long iron wire. It is measured that one side of the triangle is 14 meter, the other side is 38 meters, how long is the third side? What triangle is it?

2. A cuboid food box, length10cm, width 6cm and height12cm. What is the minimum area of this trademark paper if it is labeled all around (not up and down)?

3, a rectangular piece of iron (as shown on the right), from four corners.

Cut a square with a side length of 3cm, and then do it.

Put it in a box. How much iron is used in this box?

What is its volume?

Xiaohong and her father are both 34 years old now. Three years later, her father was 24 years older than Xiaoming. How old are Xiaohong and her father this year?

The school should paint the new classroom. It is known that the classroom is 8m long, 6m wide and 3m high, and the area excluding doors and windows is 1 1.4m2 ... If painting costs 4 yuan per square meter, how much will it cost to paint this classroom?

6. bright primary school planted 2 14 trees in the sixth grade, which is three times more than that in the fifth grade. How many trees were planted in the fifth grade?

7. The fuel tank on the car is 5dm long, 4dm wide and 2dm high. How many liters of gasoline can this tank hold?

extreme

First, I will fill it out.

1.= 24 () = () ÷ 40 = () 32 = () (fill in decimal places)

2. Mingming's age is exactly the same as Xiaohong's, and obviously older than Xiaohong. If the least common multiple of their age is 8, it is obviously () years old and Xiaohong is () years old.

3. 5. 28m =()m()DM 17 seconds = () minutes.

4. Divide the 5-meter-long iron wire into 8 segments on average, each segment accounts for () of the total length, and each segment is () meters long. ..

5. The construction team completed a section of highway in 3 days, and completed this section of highway every day on average (). According to this calculation, it will take () days to complete the road.

6. The side length of a cuboid is 48 cm, the length is 7 cm and the width is 3 cm. Its volume is () cubic centimeters and its surface area is () square centimeters.

7. There is a cuboid wood with a volume of 540dm and a cross-sectional area of 20dm. The length of this wood should be () decimeter.

8. The left and right sides of a rectangular piece of wood are squares, and the total area of the other four sides is 7.2m This piece of wood is 4.5m long and has a volume of () m..

9. If the natural number C is five times that of B, then the minimum common multiple of B and C is () and the common factor is ().

10. The figure on the right is a graph composed of a cube with a side length of 1 cm. Its surface area

Is () ㎝2, the volume is () ㎝3.

1 1. The minimum two digits that are multiples of 2, 3 and 5 at the same time are ().

12. At school, when a = (), the score is 5; When a= (), this score is 1, and when a = (), this score is a true score.

Second, I will be sentenced. (Mark "√" correctly and "×" incorrectly)

1. Natural numbers are either prime numbers or composite numbers. ()

2. The least common multiple of two natural numbers must be greater than both. ()

3.3m long1m. ()

4.a = BC, then a is a multiple of b and C. ()

5. Two big boxes with the same volume must have the same volume. ()

The propulsion rate between two unit volumes is 1000. ()

Third, I will choose. (Fill in the serial number of the correct answer in brackets)

1. In the following three figures, the one that is not the expansion diagram of the cubic surface is ().

American Broadcasting Company Inc (ABC)

2. It is obtained by () transformation.

A. translation B. rotation C. symmetry D. stretching

3. 10 has () odd and composite numbers.

A.0B. 1C.2D.3

Multiply the numerator of 4 by 5. To keep the size of the fraction unchanged, the denominator must be added with ().

A.2B.5C. 10D.20

5. White sugar 10 bag, of which 9 bags are 500g each, and the other bag 1 bag is not 500g, but I don't know whether it is heavier or lighter than 500g. If you weigh it with a balance, you can at least guarantee to find it () times.

A.3B.4C.5D.6

6. A cuboid is cut off by a small piece (as shown in the figure), and the following statement is completely correct ().

A. the smaller the volume, the smaller the surface area.

B. the volume decreases and the surface area increases.

C. the volume decreases and the surface area remains unchanged.

7. The side length of the cube is enlarged by 2 times, the surface area is enlarged by () times and the volume is enlarged by () times.

A.2B.4C.8

Fourth, I can calculate.

1. Write directly.

+=+=0.32=2 - =

-0.25=+= 12.5×8=+-+=

2. Off-mold calculation. (What can be simplified should be simplified)

0.88++0. 12+++ 15-5÷ 12-

3. Solve the equation.

χ-=8χ-9. 1=22.9

5. I can draw (draw the pattern after the "pennant" rotates 90 counterclockwise around the O point).

Six, I'll solve the problem.

1 class. Class 5 (1) stands in a row, with four people in a row, five people in a row and six people in a row. How many students are there in Class 5 (1)?

2. In mountainous areas, peach trees, pear trees and apple trees are planted, with a total area. What percentage of the total area is planted with apple trees?

3. The picture on the right is an enlarged view of a rectangular frame. If you don't want the lid,

How much material does it take to make this carton?

I hope the primary school has a cuboid classroom with a length of 10m, a width of 6m and a height of 3.5m.

(1) How big is the space in this classroom?

(2) At present, the four walls of the classroom need to be tiled with a height of1.2m.. What is the tile area of this classroom after deducting the door, window and blackboard 6m?

Tisso

First, think carefully and fill it out correctly. (per grid 1 min, ***2 1 min)

The decimal unit of 1 is (), and it has () decimal units, plus () decimal units equal to the smallest prime number.

2.18 ÷ () = () ÷ 40 = () (fill in decimal places).

3, 25 seconds = () minutes 1040 liters = () cubic meters.

560cm3=dm375cm2=()dm2

4. The common factor of16 and 20 is (), and the minimum common multiple is ().

5. Divide the 5-meter-long rope into 7 segments on average, each segment accounts for () of this rope, and each segment is () meters long.

6. Weld a 60cm long iron wire into a cube frame (the joint is ignored), and paste red paper on the surface, at least () cm2 of red paper is needed, and the volume of this cube is () cm3.

7. Candy 15 bags, of which 14 bags are equally heavy, and one bag is slightly lighter. If you weigh it with a balance, you must weigh it at least () times to ensure that you can find this bag of slightly lighter candy.

8. Among the three digits consisting of 0, 1 and 5, the number with both a factor of 2 and multiples of 3 and 5 is ().

The order of 9.0.334, 0.34 and 0.34 from small to large is: ().

10, a cuboid block with a height of 2.4dm, cut into two cuboids parallel to the bottom, with a larger surface area than the original.

100cm2 is increased. The volume of the original cuboid wood is () cm3.

Second, carefully scrutinize and judge carefully. (Put "√" in brackets for the right and "×" for the wrong) (* * 5 points)

1, the composite number is even and the prime number is odd. ()

2. Scores greater than and less than are only. ()

3. From the front, a figure must be composed of four small cubes.

Consists of ... ()

4. Because the ratio is large, the decimal unit of is also larger than that of. ()

When the side length of a cube is expanded to four times, its volume will be expanded to its original volume.

64 times. ()

Third, compare repeatedly and choose carefully. (Fill in the serial number of the correct answer in brackets) (**5 points)

1. Rotate the pattern on the left 90 clockwise around the O point, and the pattern obtained is ().

2. The sum of two adjacent natural numbers must be (). ?

A, odd b, even c, compound d, prime number

3, it is a true score, it is a false score, and A is (). ?

a、 1B、6C、7D、5

Add 8 to the numerator of 4. If the size of this fraction remains the same, the denominator should be (). ?

A, add 30B, add 8C, multiply 2D, multiply 8.

5. Add one in the middle, which is the same from the front and right, with () additions. ?

One, 2B, 3C, 4D, 5

Fourth, pay attention to examination and be careful. (***35 points)

1, a number written directly. (8 points)

2, the following questions, how to calculate how simple. (18)

3. Solve the equation. (9 points)

Fifth, operational thinking. (*** 10 point)

1, draw the following three-dimensional figures from the front, top and left respectively. (6 points)

2. Draw a picture as required. (4 points)?

(1) Move Figure A five squares to the right and draw Figure B. ?

(2) Draw a graph C obtained by 90 counterclockwise rotation of graph B around point O. ..

Sixth, apply knowledge to solve problems. (***24 points)

At the 20 14 Nanjing Youth Olympic Games, the China sports delegation won 38 gold medals, 13 silver medals and 14 bronze medals. What is the percentage of gold medals in the total number of medals? (4 points)

Two engineering teams, Team A and Team B, are building a railway together. Team A repaired the whole length, while Team B repaired less than Team A. How much did they repair? (4 points)

The school should paint the meeting room. It is known that the conference room is 20m long, 12m wide and 4m high, with an area of 30m2 excluding doors and windows. (6 points)

(1) If it takes 4 yuan paint per square meter, how much will it cost to paint this conference room?

(2) How much space does this conference room occupy?

Two athletes A and B are practicing running on the playground. A runner completes a lap in 4 minutes, B runner completes a lap in 6 minutes, and A and B runners start at the same starting point. At this point, how many minutes does it take for two people to meet again? (4 points)

5. The picture on the right shows the statistics of Ming Ming and Liang Liang's long jump results. (6 points)? (1) What is the difference between Mingming and Liangliang in the long jump?

How many meters short? ?

(2) Put forward a math problem and answer it.