I will fill in the blanks (23%)

1. In an earthquake, relevant receiving institutions in China received donations from all walks of life at home and abroad139.25 million yuan. The unit of yuan is rewritten as () yuan, and the mantissa after omitting 1 billion bits is about () billion yuan.

2,0.75 = () ⊙ () = 9: () = ()% = () times

3. The 29th Olympic Games is held in China every four years, so the 50th Olympic Games should be held in ().

4. The simplest integer ratio of 2.4: 35 is (), which is (). X| k |B| 1。 c |O |m

5. () is the smallest natural number and the largest negative integer is ().

The scale of the map is 1: 1000. If the area of a rectangular lawn measured on this map is 4 square centimeters, then its actual area is () square meters.

7.△△□☆★△□☆★△△□☆★ ... The 30th from the left is ().

8. Last week, the amount that the Xiaoyue family spent on food every day was as follows.

Sunday Sunday Monday Tuesday Wednesday Thursday Friday Saturday

Amount/Yuan 40 20 24 34 40 26 40

Last week, abortion families spent an average of () yuan on food every day. The median of this set of data is ().

9. On a certain day in summer, the time ratio between day and night is 5: 7, and the daytime is () hours.

10, with 4, 9, 0, 1 four digital cards, you can put out () different three digits.

1 1, the picture on the right shows the relationship between the time after a faucet is turned on and the water output. (1) Look at the picture and fill in the form.

Time/second 40

Water output/liter 9

(2) The opening time of this faucet is directly proportional to the water output.

12, as shown in the figure, in △ABC, AE= 13 AC, BD= 14 BC, then the ratio of shadow area to blank area is ().

Second, I will choose. (6 points)

1, the three sides of a right triangle are 6cm, 8cm and 10cm respectively, and the area of this triangle is () cm? .

A, B, C, D, 480

2. The readings of Mr. Wang's electricity meter are 360 degrees in May and 40 1 degree in June. Since the price of household electricity is X yuan per kilowatt-hour, Mr. Wang's family should pay the electricity bill () yuan in June.

a、40 1x B、4 1x C、360x

3. As shown in the figure, the location of the school is represented by several pairs as (), and the school is in the () direction of the supermarket.

a 、( 2，3) B 、( 3，2)

C, 45 degrees east of south, 45 degrees west of south.

4. A rectangular fish tank with a length of 4 cm, a width of 3 cm and a height of 5 cm. After pouring water, the water depth is 3.5 decimeters, and the water is poured () liters.

a、60 B、52.5 C、42 D、70

5. As shown in the figure, there is a cubic paper box without a cover, and the letter "M" is marked on the bottom. If it is cut along the thick line in the figure and expanded into a plane figure, it is ().

A. BC

Third, I can calculate. (18)

1, find the unknown X. (6 points)

( 1)X―0.25 X = 1.5(2)38: 14 = X: 1 10

2. Recursive equation calculation. (12)

( 1)3-( 12.9-84× 17 ) (2)44.4×25

(3) 40 13 ×(26×340 ) (4) 2―[ 16 +(34 -7 10 )]

Fourthly, I will explore the mysteries of graphics and geometry. (15)

1, the picture on the right is a rectangle with a length of 4 cm and a width of 3 cm.

(1) Draw a line segment in the rectangle and divide it in two.

The largest isosceles right triangle and trapezoid. (2 points)

(2) Find the area of this trapezoid. (3 points)

(3) Take a right-angled side of an isosceles right triangle as the axis and rotate it once to form (). Calculate the volume of the three-dimensional figure formed by this rotation. (5 points)

2. Draw a picture on the right according to the following requirements.

(1) How to build a road from Jinxing Decoration City to Zhongshan Road?

Please draw it on the picture. (2 points)

(2) There is a building materials market 600 meters east of Jinxing Decoration City.

Please mark its position in the picture and mark the length of the drawn line segment. (3 points)

Verb (abbreviation for verb) I will solve this problem. 34 points (5%×5+3%+6%)

There are 20 boys in Class 1 and Class 6 (1), 20% less than girls. How many students are there in Class 6 (1)?

2. Eight workers wove 360 horses in 15 days. How many horses does each worker weave on average every day?

3. The number of science and technology books purchased by the school library is 37% that of story books. Purchase quantity of science and technology and story books *** 1500. How many science and technology books do you buy? (Equation solving)

4. Master Zhang processes a batch of parts, and the ratio of the number of parts completed on the first day to the total number of parts is 1:3. If we reprocess 15 parts, we are halfway done. How many parts are there in this batch?

If Xiaoming shouts at the opposite mountain at the top of the mountain, he will hear the opposite echo in about 4 seconds. As we all know, the speed of sound propagation in the air is about 340 meters per second. How many kilometers are there between the two peaks?

6. The following are movie advertisements in a movie world:

The name of the movie is Harry? porter (at a railway station)

Fare 45 yuan

40% discount for morning performance

There is a 20% discount on the afternoon performance.

There is no discount for night performances.

7、

(A) (B) (C) (D)

What is the relationship between the above four volumes? Please write three. (For example, the volume of B is 13 or the volume of A is three times that of B)

①

②

③

Reference answer

fill up a vacancy

1, (139250000) yuan, about (139) billion yuan.

2,0.75 = (3) ÷ (4) = 9: (12) = (75)% = (75) times.

The 40th Olympic Games should be held in (2052).

4, 2.4: The ratio of the simplest integer is (4: 1), and the ratio is (4).

5、0、- 1

6. Its actual area is (400) square meters.

7.△△□☆★△□☆★△△□☆★ ... The 30th from the left is (★).

Last week, Xiaoyue spent an average of (32) yuan on food every day. The median of this set of data is (34).

9. On a certain day in summer, the time ratio between day and night is 5: 7, and the daytime is (14) hours.

10, with 4, 9, 0, 1 digital cards, you can put out (18) different three digits.

1 1, (1) Look at the picture and fill in the form.

Time/second 40 45

Water output/liter 8 9

The opening time of this faucet is in direct proportion to the water output.

12, the ratio of the area of the shadow part to the blank part (1: 3).

Second, choose 7 points.

Title 1 2 3 4 5

Answer A B B D C B

Calculate 26%

1, find the unknown x.

( 1)X=2 (2)X=320

2, calculation, you can use a simple method to calculate.

3-( 12.9-84× 17 ) 44.4×25 40 13 ×(26×340 ) 2―[ 16 +(34 -7 10 )] =2. 1 = 1 1 10 =6 = 14760

1, the picture on the right is a rectangle with a length of 4 cm and a width of 3 cm.

(1) Draw a line segment in the rectangle and divide it in two.

The largest isosceles right triangle and trapezoid. (2 points) The answer is short.

(2) Find the area of this trapezoid. (2 points)

7.5 square centimeters

(3) With a right-angled side of an isosceles right triangle as the axis, a (cone) will be formed after one revolution. Calculate the volume of the three-dimensional figure formed by this rotation. (2 points) 28.26 cubic centimeters

2. Draw a picture on the right according to the following requirements.

(1) How to build a road from Jinxing Decoration City to Zhongshan Road?

Please draw it on the picture. (2 points)

(2) There is a building materials market 600 meters east of Jinxing Decoration City.

Please mark its position in the picture and mark the length of the drawn line segment. (2 points)

Short answer

Three, solve the problem 34 points (5%×5+3%+6%)

1. If Xiaoming shouts at the opposite mountain at the top of the mountain, he will hear an echo from the opposite side after about 4 seconds. As we all know, the speed of sound propagation in the air is about 340 meters per second. How many meters is there between the two peaks?

680 meters

2. The number of science and technology books purchased by the school library is story books. Purchase quantity of science and technology and story books *** 1500. How many story books do you buy? (can be solved by equation) 1050.

3. There are 20 boys in Class 6 (1), less than girls 15. How many students are there in Class Six (1)?

45 people

4. Pour 270 ml of juice into 6 small cups and 1 large cup, just full. The capacity of a small cup is 13 of that of a large cup. What are the capacities of large and small cups?

The big one is 90 ml, and the small one is 30 ml.

5. The following are movie advertisements in a movie world:

The name of the movie is Harry? porter (at a railway station)

Fare 45 yuan

40% discount for morning performance

There is a 20% discount on the afternoon performance.

There is no discount for night performances.

I watched an afternoon movie, and the ticket price was reduced to 36 yuan.

6、

(A) (B) (C) (D)

What is the relationship between the above four volumes? Please write three. (For example, the volume of B is 13 or the volume of A is three times that of B).

① ② ③

7. On an expressway, buses and trucks depart from A and B respectively, and the distance between them is 120km. The bus travels 40 kilometers per hour and the truck travels 60 kilometers per hour. /kloc-how many kilometers are the two cars apart after 0/hour? (Write down at least two possible situations)