1, 10 is (); () Ten million is one hundred million.

2. A number consists of 500 million, 6 million, 3 million and 9 10. This number is a () number, written as () and pronounced as ().

3. The angles we have studied are (), (), (), (), (), () and ().

4. A line segment has () endpoints, a ray has () endpoints, and a straight line has () endpoints.

At 3 o'clock sharp, the angle formed by the hour hand and the minute hand of the clock is () degrees, which is () angle.

6, a seven digits, its digits are ().

The five digits of 7.0, 6, 3, 8, 1 are (), and the smallest five digits are ().

8. When two straight lines intersect into (), the two straight lines will be ().

9. Of all the connecting lines between two points, () is the shortest.

10, each () bit in the decimal number sequence table is one level, and one billion bits are (), (), (), ().

1 1, 405263 1 is () digit, where 4 in () digit means () and 5 in () digit, and its counting unit is (), rounded to ten thousand digits is about ().

12, write the number according to the law.

( 1)2002,3003,( ),( ),6006,( ),( )。

(2)6060, 6040,( ),( ),( ),5960,( )。

13, compare sizes.

1000009995607000005607 million

28 12000 ○ 2809800 199999 ○ 200000

Second, the judgment question. (10) (Mark "√" for the right and "×" for the wrong)

1, a straight line is 30000 meters long. ( )

2. The longer the side of an angle, the bigger the angle. ( )

3. Units, ten, hundreds and thousands are all counting units. ( )

There are 46 students in our class and about 2000 students in our school, both of which are exact figures. ( )

5. A decimal number has one billion digits. ( )

Third, multiple choice questions. (Fill in the serial number of the correct answer in brackets) (10)

1, clearly drew a () 3 cm long. ( )

A, straight line b, ray c, line segment d, angle

2, 7 () 5030 ≈ 770,000

a、6 B、7 C、5

3. In the following figures, one zero is not read ().

a、50 1500 B、500500 C、5005 10 D、50 1050

4. The size of the angle is related to the angle (). 、

A, two sides of the opening b, two sides of the length c, vertex

5. Among the following four figures, the one closest to 80,000 is: ()

a、80 10 1 B、79989 C、79899 D、79979

Fourth, the operation questions. (8 points)

1. Draw an acute angle, a right angle, an obtuse angle, a right angle and a set of parallel lines on the point diagram. (5 points)

2. What is the shortest road from point A to the river in the picture? Please draw it. (3 points)

Fifth, solve practical problems. (27 points)

1. Graph * * *, how many line segments and angles are there? (6 points)

3. As shown in the figure, the number of times ∠1+∠2 =135 ∠1= 35 to find ∠ 2, ∠3, ∠4 is known. (9 points)

3. Rewrite the following figures into "ten thousand" numbers, and then arrange them in descending order. (8 points)

3 1680000= 142600000= 7940000= 88600000=

()& gt()& gt()& gt( )

4. Write a number that meets the following requirements with five numbers: 0, 0, 8, 8 and 8. (4 points)

Five digits of (1). ( )

② The number closest to 80000. ( )

(3) Numbers that don't read zeros. ( )

(4) A number in which both zeros are read. ( )

Reference answer

One,

1, (one million) (10) 2, (9) (506030090) (50603090).

3. (acute angle) (right angle) (obtuse angle) (right angle) (rounded corner) 4. (2)( 1) (None)

5, (90) (straight) 6, (ten thousand) 7, (863 10)( 10368)

8. (right angle) (perpendicular to each other) 9. (line segment)

10, (4) (billion bits) (billion bits) (billion bits)

1 1, (7) (million) (4) (million) (million) (million) (4.05 million)

12、( 1)(4004)(5005)(7007)(8008)

(2)(6020)(6000)(5980)(5940)

13 、( >； )(=)(& gt； )(& lt)

Second, (×) (×) (×) (×) (√)

Three. (C)(A)(A)(A)(B)

Four. (sketch)

Five,

1、( 10)(6)

2、∠2= 135 ﹣35 = 100 ∠3= 180 - 100 =80

∠4= 180 -35 = 145

3.3 1.68 million 1.42 million 794 million 88.6 million.

(142.6 million) > (88.6 million) > (3 1.68 million) > (7.94 million)

4、( 1)88800 (2)80088 (3)88800 (4)80808