1, 10 billion is (), 10 billion is ().

2, a multi-digit, the number on the ninth digit is 1, the number on the fifth digit is 5, and the numbers on other digits are all 0. This number is written as ().

3, 7590000000 is pronounced as ().

4./kloc-0.509 million yuan (), and the mantissa after omitting/kloc-0.09 million yuan is about ().

5. The number less than 1 is ().

6. The two counting units adjacent to one billion are () and ().

7. A number is 36 on a billion-dollar scale and 36 on an individual scale, which adds up to ().

8, write at least ten digits, make each number different, this number is ().

Second, read the numbers below.

1 and 6709030 are pronounced as ()

2.50000090 1 pronounced ()

3, 94200000000 is pronounced as ()

According to statistics, in the first half of 200 1 year, Beijing's GDP was 123370000000 yuan, pronounced as ().

Third, read the numbers below.

1, 904 million write ()

2, 2.3 million writing ()

3. The dinosaur fossils found in Sichuan are10.3 billion years ago ()

4. After the completion of Gezhouba Hydropower Station on the Yangtze River, it can generate13.8 billion kWh per year. Writing ()

Rewrite the following figures into hundreds of millions.

1、 10300000000( ) 2、24 100000000( ) 3、600000000( ) 4、90000000000( ) 5、999900000000( ) 6、8000000000 ( ) 7、3800000000( ) 8、500300000000( )

5. Omit the mantissa after 1 100 million of the following figures and write their approximate values.

1, 61900,000 () 2,495,090,000 () 3,705,380,000,000 () 4,260,800,000 yuan () 5,0/kloc-3,300,000 meters () 6

The intransitive verb is filled with > or = in () and<

1、 12300000( ) 1230000000

2、36000000( )76000000

34080000000 () 4.8 billion.

4. 100 million ()100 million

7. Judgment (tick right, x wrong).

1 and 60000m are as long as 60000m. ( )

2. The unit of counting is the number of digits. ( )

Remove the word "100 million" from the 4.5 billion and add nine zeros at the end. ( )

4.695,000 = 700,000.( )

5.408 1950000≈4 1 100 million. ( )

Eight, choose the correct answer to fill in ().

1, 20000000 () 200 million.

① = ②≈

258 □ 4000000 ≈ 5.9 billion.

①8 ②4

3. The number of natural numbers is ().

100 billion, two infinity.

4. The number closest to one billion is ().

1.99 billion 2.909 billion 3.999 billion.

Nine, think about it.

1, 300 million, 408 million, the number is (), the number is (), and the number is (). It takes "million" as the unit and "ten thousand" as the unit, which is about () million.

2. The first order number, ten thousand series and one hundred million series are all 7, and this number is (). This figure is rounded to hundreds of millions, which is probably ().