I. Fill in the blanks (2 points for each question, *** 18 points)

1. There are about 49 million olfactory cells in human beings. When writing (), the number rewritten as "one" is ().

2. 6 tons and 25 kilograms = () tons and 6.25 hours = () hours and () minutes.

3、( )/ 15=2:( )=4÷( )=( )%=0.4

The Olympic Games is held every four years. The 2008 Beijing Olympic Games will be the 29th, so the 24th Olympic Games will be held in ().

Dad said: I am four times older than Xiaoming. Xiaoming said: I am one year old this year. I use a formula containing letters to represent my father's age, which is written as ().

There are six red balls and three yellow balls in the pocket, which are exactly the same except the color. Now 1 balls are found, and the possibility that they are red balls is ().

7, 4/7 numerator plus 8, to make the size of the fraction unchanged, the denominator should be added ().

8. Look at the right figure, the area of the shaded part is () of the rectangular area, and it is known that ∠ 1 = 60.

Then ∠ 2 = (),

The greatest common divisor of 9, 8 and 12 is (), and the least common multiple is ().

Second, multiple-choice questions (***5 points)

1, among the following figures, the one that is not axisymmetric is ().

A, circle b, square c, parallelogram d, isosceles trapezoid

2, the following two proportions can't form a proportion is ().

a、 10: 12=35:42 B、20: 10=60:20

c、 1/2: 1/3 = 12:8d、0.6:0.2=3/4: 1/4

3. For data 3, 3, 2, 3, 6, 3, 10, 3, 6, 3, 2, the following conclusions are correct ().

A. the mode of this set of data is 3 B, and the mode of this set of data is different from the median.

C, the median of this set of data is the same as the average D, and the mode of this set of data is the same as the average.

4, in the following items, the two quantities are inversely proportional to ().

A, the perimeter and side length of a square b, a certain distance, time and speed.

C, 4x=5y D, radius and area of a circle.

5. Brother's height 120cm, shorter than brother's 1/6. The correct formula for calculating elder brother's height is ().

a、 120×( 1+ 1/6)B、 120( 1+ 1/6)C、 120×( 1- 1/6) D、 120( 1- 1/6)

III. True or False (***5 points)

1. If the number of meters to the east is negative, then the number of meters to the north is positive. ( )

2. Three sticks with lengths of 6cm, 8cm and 10cm can form a triangle. ( )

Forty students in the class did a math problem right and four students did it wrong. The error rate of this question is 10%. ( )

There are four balls in the box, which are written 2, 3, 4 and 5 respectively. The probability of encountering a singular number is high ()

5. A rope is 4m long and divided equally by four red dots, and each segment is 1/4 total length. ()

Four, calculation (22 points)

1, a number written directly. (65438+ 0 points for each question, ***8 points)

1.45-0.75= 0.75+ 1/4= 1÷0. 125-8= 4 × 1/7×3/4=

6.3 ×0.02= 10/9÷8/9= 10×4/5= 3/4×4÷3/4×4=

2, how to calculate as simple as possible. (3 points for each question, *** 12 points)

( 1)36 18÷45-0.2 (2)4-4/5÷4-4/5

(3) 13/5×8×8/ 13× 1.25 (4)2.9÷8+ 1. 1× 1/8

3. Solve the equation (proportion). (3 points for each question, ***6 points)

( 1)5/6:X = 0.3:3/5(2)4 X- 1.6 X = 24

V. Graphic operation and calculation (1 1)

1, operation

The vertex A of the (1) triangle is located at (,).

(2) The vertex B of the triangle is 3cm south of the vertex, located at (,), the vertex C is at (1, 6), and it is in the direction of () to the west of the vertex A. Please trace the points B and C in the figure and connect them into a closed figure in turn.

(3) After the triangle rotates 90 clockwise around point B, draw a new figure ... and then translate the new figure down by 5 squares to draw the exchanged figure.

2. Calculate the area of the shaded part on the right.

Part II Problem Solving (5 points for each question, * * * 39 points)

1. In the long history of the earth, 90,979 species of birds have become extinct, 769 more than the current 10 times. How many kinds of birds are there?

2. The schoolbag weight of primary school students should not exceed 3/20 of the weight, otherwise it will seriously hinder the growth of bones. Wang Ming's schoolbag weighs 5 kg and 30 kg. Is his schoolbag overweight? Why?

3, a newspaper, if you subscribe monthly, there is no discount, each 10 yuan; If you subscribe to this newspaper once a year, you can get a 10% discount. How much does it cost to subscribe to this newspaper once a year rather than once a month?

4. The world population reached 6 billion in 1999 and is expected to increase in 20 13. How many billions will the world population reach in 20 13 years?

5. Dad wants to tile the bright little study. You need 90 square bricks with a side length of 2 meters. How many square bricks do you need if you replace it with a square brick with a side length of 3 meters? (Use proportional solution)

6. The sum of the height and the bottom diameter of the cone is 9 decimeters, and the ratio of the height to the bottom diameter is 1: 2. What is the volume of this cone?

7. An umbrella factory urgently produced a batch of tents to support Sichuan earthquake resistance. On the first day, 20% of the total number of tents was produced, on the second day, 7/20 of the total number of tents was produced, and 4,400 tents were produced in two days. How many tents are there in this batch?

8. On the 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?

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