In 2008, the sixth grade mathematics graduation simulation test paper in primary school.

First, think carefully and fill in carefully (18 points)

1.At the end of 2005, the total population of China was1299,880,000, about () billion people. Among them, the population aged 0- 14 is 279.47 million, the number on the horizontal line is (), and the number rewritten as "one billion" is () billion, which is about () billion. The population aged 0- 14 accounts for about () () of the total population in China.

2, 4.08 cubic meters = () cubic meters () cubic decimeter.

3、 = 12:( )= ×( )=( )÷5=2

4. If the prime factors of two natural numbers * * * are only 3 or 5, then their common divisor is ().

5. In 2006, the number of days with "good" air quality in Ningxia accounted for 80% of the whole year, and the number of days with "good" air quality in Ningxia was ().

6. Adding a number between 3, 4 and 12 that can form a proportion is (), and this ratio is ().

7. Young Pioneers perform gymnastics. There are x boys and y girls in each row, standing in 8 rows, and there are () people in * * *.

8. In the figure of 0.25, 125%, 25,2. 5 and 2, the largest number is ().

9, cylinder and cone bottom radius and volume are equal, respectively, the height of the cone is 65438 0.5 decimeter, the height of the cylinder is ().

10, the scale of a plane sketch is 1: 60000, and the road with a length of 2400 meters should be () cm on the map.

Second, criticize, true and false, and explain the reasons for the fifth small judgment (6 points).

1, The Beijing News reported that in 2004, the average annual salary of Beijing employees exceeded 30,000 yuan. This news shows that the annual salary of Beijing employees is more than 30,000 yuan. ( )

2. The number of donations to students' learning newspapers is directly proportional to the number of newspapers. ( )

In order to clearly show the monthly output and its changes in the first half of the year, the TV factory should draw a broken line statistical chart. ( )

4. 98 soybeans were used for germination test, all of which germinated. The germination rate is 98%. ( )

5. The sum of the two internal angles of a triangle is 100, so this triangle must be an acute triangle. ( )。

Reason:

Third, compare repeatedly and choose carefully. (6 points)

1, CCTV evening news broadcast begins, which is indicated by 24-hour timing ().

A, 7: 00 b, 19: 00 c, 7: 00 d in the evening, 19 hours.

2. To make 623 divisible by 2 and 3 at the same time, at least add ().

a、 1 B、2 C、5 D、6

3. The sum of number A and number B is 300, the ratio of number A to number B is 5: 7, and number A is ().

a、 120 B、 125 C、 175 D、 180

The picture on the right is a cuboid with a length of 3 cm and a width of 2 cm. from this

Dig out a small cube with a side length of 1 cm, and its surface area is ().

A. bigger than the original B. smaller than the original C. unchanged D. uncertain

5. It takes 10 days for a single manicure team and 8 days for team B to build a 3 km long highway ... If two teams cooperate at the same time, how many days will it take to complete? The correct formula is ().

A, 1 degree (+) B, 3 degrees (+) C, 3 degrees (+)

6. Wang Qiang deposited RMB 65,438+0,000 in the bank with an annual interest rate of 2.25%. After two years, calculate his net interest after paying 20% interest. The formula should be ().

a . 1000×2.25%×2×( 1-20%)+ 1000

B.[ 1000×2.25%×( 1-20%)+ 1000] ×2

c . 1000×2.25%×2×( 1-20%)

Fourth, be careful, and you can get it right quickly (8+ 12+6+2+6 = 34).

1, the number is written directly.

- = 38 ×89 = 15 +45 = 1.03+0.07=

1- 12 - 14 = 14 ×25%= ( 13 + 1)÷ 1 13 = 0.6:0.36=

2. Non-type calculation

46×8- 120÷ 15 ( 12.5×8-40)÷0.6

73 1 ÷52 +35 ×73 1 15 ÷[(23 + 15 )× 1 13 ]

3. find the unknown X.

25:X = 2.2:55 25 X- 13 X = 3 10

4. Can you use a calculator?

When Xiao Ming calculated "49×6" with a calculator, he found that the key "4" of the calculator was broken. The clever Xiao Ming had a brainwave and quickly worked out the correct result with this calculator. He calculated it this way: 50 × 6-6. Can you think of other algorithms? Please use formulas to express your ideas.

5, guess (answer a few, and write down the reasons. )

Use your head and you will succeed. (6 points)

1. Draw a square with a side length of 4 cm on the right. ( 1)

2. Draw the largest circle in the square.

Draw how you find the center of the circle on the map. ) (2 points)

If you cut off the circle of this square, what is the remaining area? (Column calculation, 2 points)

4. The rest (1 point) has () symmetry axes.

VI. Practical application (4×3+6×3=30 points)

1, a batch of goods, shipped 10 tons, how many tons is this batch?

(Add the conditions first, then answer.

2、

The distance between a and b is 504 kilometers. It takes 34 hours for a car to travel from A to B.. At this rate, how many hours will it take to get to B? (Use proportional solution)

4. The following table is the statistical table of the output and growth of various agricultural products in Xinxing Town in 2003 and 2004. Please complete the form according to the output or growth of agricultural products in each year. (6 points)

Growth rate in 2003 and 2004/%

Grain/ton is 40,004,200, which is ()% higher in 2004 than in 2003.

Oil/ton 300 () increased by 20% in 2004 compared with 2003.

Fruit/ton () 515 increased by 3% in 2004 compared with 2003.

5.( 1) Xiao Fang walks 80 meters per minute. She walked from Four Seasons Pavilion to Moon Lake in 16 minutes, and from Moon Lake to bonsai garden in 12.5 minutes. From the Four Seasons Pavilion to the Moon

How many meters does it take from Lianghu to bonsai garden? (3 points)

(2) Four Seasons Pavilion to bonsai garden 1270 meters. Xiaojun and Xiao Fang set out from Sijige and bonsai garden at the same time, walking in opposite directions, and met after 9 minutes. How many meters does Xiaojun walk every minute? (3 points)

6. Mom's teacup, so put it on the table. (pictured)

(1) How many square centimeters does this teacup occupy on the desktop? (2 points)

(2) Is the decorative belt in the middle of the teacup beautiful? That's what Xiao Ming put on for fear of scalding his mother's hand. The width of this decorative belt is 5 cm. How long will it take at least (Ignored at the joint) (2 points)

(3) What is the volume of this teacup after it is filled with water? (2 points