1, 500,000 and 8,000 is ().

2. From the unit point of view, the number () is 10,000, the number () is 100 million, the number six is (), and dozens are ().

3. The number 20538000 is (), and the highest digit is (), where "3" means ().

4. A fillet = () right angle = () right angle.

5. There are () right angles and () acute angles on the triangular ruler.

6. Xinhua Dictionary has 825 pages, about () pages.

7. Every square has () groups of parallel lines, and the opposite sides of the square are opposite ().

8. 12 is 103 times (), 930 is 93 times ().

9.(a×b)×c=a×(b×c) stands for the law of ().

10. Only () straight lines can be drawn after two o'clock, and only () straight lines can be drawn after one o'clock.

Second, the judgment (2 points ×5)

1, two parallel lines never intersect. ( )

2. Approximate value must be greater than exact value. ( )

3. The opposite sides of a square are perpendicular to each other, and the adjacent sides are parallel to each other. ( )

When you wrote 403000, you didn't write zero. ( )

An angle of 5,0 is as big as an angle of 360. ( )

Third, the choice (2 points ×5)

1, two mutually perpendicular straight lines can intersect into four ().

A, acute angle b, right angle c, obtuse angle

2. The size of the angle is related to both sides ().

A, the size of the opening b, length

3. A * * in the picture below has () angles.

a，4 B，6 C， 10

4. You can draw () a straight line after a while.

A, 1 B, 2 C, countless

5. In the calculator, if you find that the number is incorrect, you can use ().

A, press C, CE key B, and use the eraser.

Four. Calculation after estimation (3 points ×4)

12 1× 12 5×9 12 408×33 3 12× 16

Five, with a simple method to calculate (3 points ×4 points)

20 1×24 37×99+37 125×(7×8) 24×7×5×6

Six, column calculation (3 points ×2 points)

What is the sum of 1 and 23 837s?

What is the 12 times of 2.756?

Seven, the operation problem (13 points)

1, draw the specified angle as required (1.5 minutes× 4).

95 degrees, 40 degrees.

130 angle, 170 angle.

2. A quantity (1.5 minutes× 2)

() cm () cm

3. Make parallel lines and vertical lines of known straight lines M and N through point P .. (4 points)

Eight, the application problem (17 points)

1, a is 500 kilometers away from b, and a car travels for 3 hours 180 kilometers. According to this calculation, can you arrive in 8 hours?

A road is 80 meters wide. What's the shortest way to cross this road in Yang Yang? How many meters does the shortest one have to walk? Why? (Examples can be given)

During the summer vacation, the students went to the theater to watch the performance. The theater has 358 seats, each ticket is 25 yuan.

(1) 260 tickets have been sold. How much is the collection?

(2) How much can a * * * collect for the remaining tickets sold in 20 yuan?