1. Fill in the blank: (65438+ 0 for each blank, ***25)

1, =3÷( )=( )%= () becomes ()

5 liters and 8 ml =( 5.008) liters.

2.8.06 hectares =( 80600) square meters, and the first quarter of 2000 was (9 1) days.

3. The sum of the simplest true fraction with denominator of 6 is (1), and the smallest sum is (4).

4. Use the divisor11to form the proportional formula (1:3 = 37:11).

5. The area of a circle is 28.26cm2, the radius is (3cm) and the circumference is (18.84cm).

6. Subtract the maximum two digits by 10 to get (9.9), and the sum of it and (90. 1) is 100.

7. When the side length of a square is enlarged by 2 times, its surface area is enlarged by 4 times and its volume is enlarged by 8 times.

8. To complete the same distance, Party A needs 12 points, and Party B needs 8 points. The simplest integer ratio of speed between Party A and Party B is (2:3).

9. A pile of 20 tons of sand can be transported in five days, with an average of (20 )% per day and (12) tons in three days.

10, (bar) statistical chart is the easiest to see the number of various quantities; The statistical chart can clearly see the increase and decrease of quantity.

1 1, the time to produce a part is shortened from 8 minutes to 5 minutes, and the work efficiency is improved by (60 )%.

12, the average value of a, b and c is 6, and their ratio is::. These three numbers are (), () and ().

Second, judgment: (tick × correctly, tick √ wrongly. 5 points)

1, in the equation 2x- 16=4, X= 10 (√).

2, 0 is a natural number. ( √ )

3. The reciprocal of any natural number is less than 1. ( × )

The trapezoid is equal to half of the product of the sum of the upper and lower bottoms and the height. ( )

5. Two triangles with the same base and height can form a parallelogram. ( × )

Third, multiple-choice questions (fill in the serial number of the correct answer in brackets. 4 points)

1, 0.995 The reserved decimal places are () a, 0.99 B, 1.00 C, 1 D, 0. 1.

2. Party A and Party B need 10 days and Party B needs 8 days to complete a project alone ... The work efficiency ratio of Team A and Team B is ().

a、 10:8 B、5:4 C、:D、

3. A rectangular teaching aid with a length of 6 cm and a width of 4 cm can be welded with a 52 cm long wire with a height of (b) cm. a、4 B、3 C、5 D、2

4, the area of the circle and its radius (C)

A, proportional to B, inversely proportional to C, out of proportion

Four, calculation (26 points)

1, write grades directly (8 points)

120+280=400 7÷ 1.4=5 125×0.8= 100 7.2÷8×4=3.6 2 - =

× = 5.5+39.27+4.5=49.27 ( + )× 12=

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

1375+450÷ 18×25 [2-( - 1.5)÷ ]×

= 1375+25×25

= 1375+625

=2000

68× × + 1.25× + 125%

3. Find the unknown X. (6 points)

X:7.5=0. 16: X- =

V. Answer the following questions (10)

1, a number is 8 less than its number. What is 20% of this number?

2, dig a channel, its cross section is trapezoidal, its cross-sectional area is how many square meters?

Six, painting questions (4 points)

1. Draw a circle with the diameters of the following line segments. 2. Draw a line in the trapezoid shown below and divide it into parallelogram and triangle.

. . . . . .