(1) is an integer. Starting from the right, the fourth number is () and the tenth number is ().

②20800000 consists of two () and eight ().

(3)60006000 is () digits, the highest digit is () digits, 6 on the left means (), and 6 on the right means ().

(4) The number with 1 more than the maximum four digits is (), and the number with 1 less than the minimum six digits is ().

(5)5000000= () 998300? () Ten thousand

8000000000= () 1249990000? () Billion

(6) For an 8-digit number, the digits on the tens of millions, tens of thousands and thousands are all 9, and the digits on other digits are all 0. This number is written as () and read as (), and the accuracy is about () to 10,000 digits.

Second, the question of right and wrong (right? , wrong number? )。

(1) The smallest seven digits are1111. ( )

(2) The three zeros in 30904098 are all in the middle and should be read. ( )

(3) A 12 digit, and its' highest bit' is 1000 billion digits. ( )

(4)449800000? 500 million ( )

(5) The difference between the largest eight digits and the smallest nine digits is 1. ( )

Third, multiple choice questions.

(1) Among the following numbers, the smallest number is ().

408065 b . 408056 c . 408065666

(2) Among the following numbers, the number that does not read zero is ()

500,600 dollars

(3) 19□789? 190,000 yuan, the box can hold at most ().

A.5 B.4 C.9

(4) Ten thousand pieces of land, which is dozens of times that of ().

1 00000100000/0000001000000.

(5) 300 million have ().

A.30 ten thousand B.30 ten million C.30 one hundred

Read and write.

24005600 is read as:

4578000000 display:

1443800 display:

9.6 million writing:

Three thousand two hundred and one thousand three words:

666,700 words:

Fifth, find friends.

345000

8080000

5060080

120500

204056

9002000

120500

204056

9002000

Reading 0 has ()

Don't read zero ()

Read two zeros ()

6. Play the group number game with the following eight numbers.

0、0、0、0、6、6、6、6

Write a number () instead of reading zero.

Write a number with only one zero ()

Write the number () and read two zeros.

Write the number () as three zeros for reading.

7. Put the following numbers in order from small to large.

70.05 million 75 million 70.06 million 70.5 million

()& lt()& lt()& lt( )

8. How many can I fill in the brackets?

8( )742? 80,000 248( ) 127? 2.49 million 15( )4780000? 654.38+500 million

9. 5 1453502 is a () digit, and the highest digit is a () digit, in which three 5s represent (), () and () respectively. 5%

Ten, find a rule to fill in the numbers.

Fifty thousand, (), (), two hundred thousand, two hundred and fifty thousand, (), three hundred and fifty thousand.

Thirty million, sixty million, ninety million, (), (), ().

Twelve,

A six-digit number, rounded to the nearest ten thousand digits, is about half a million. The maximum value of this six-digit number is () and the minimum value is ().