Category name

I. Fill in the blanks (24 points)

The sum of 1, 14 32 is (), and 20 times of 480 is ().

2.500340700 is () digit, the highest digit is () digit, "5" means () digit, "3" means () digit, "4" means () digit and "7" means () digit.

3, 3570200000 is pronounced as (), and it is rewritten as () in the unit of "ten thousand", and the mantissa after omitting the "hundred million" bit is about ().

4. The two sides of the angle are () lines, and the size of the angle has nothing to do with (), but is related to ().

5. The telescopic door of the school gate made of the characteristics of parallelogram ().

6. If two straight lines intersect, one angle is 90, then the other three angles are () angles, and these two straight lines ().

7. The train can travel 60 kilometers per hour. Its speed can be written as (), and the speed of light is 300,000 kilometers per second, which can be written as ().

845,000 ≈ 470,000 ≈ 492.3 million ≈ 4.9 billion.

9. Arrange right angles, acute angles, obtuse angles, right angles and rounded corners in descending order:

( )