1, from the unit, the seventh place is (), its counting unit is (), the ninth place is (), and its counting unit is ().

The highest bit of 2.6006006 is (), the right 6 means 6 (), the middle 6 means 6 (), and the left 6 means 6 ().

3. The number consisting of three tens of millions, three hundred thousand, three thousand and eight is (), which is probably () ten thousand.

4. The number 1 greater than 99999 is (), and the number1less than 1000 is ().

5. Use 0, 1, 2, 3, 4, 5. The smallest six digits are () and the largest six digits are ().

6. Write the following figures in tens of thousands.

89000000=785000509000

7. Write the following figures in hundreds of millions.

500000000=9958200000742 1305678

8,63845000 is () bit, the highest bit is () bit, and 8 is () bit, indicating ().

9. Starting from the right, every () digit is divided into one level, and the digits of each level have (). What does it mean?

A (ten thousand-level counting unit includes (), indicating how many () there are.

10, fill in ○ or =.

58000000 ○ 5899984 10000 ○84 10000

52600700000 ○ 52607000060024000000006 billion

1 1, the highest digit of one billion digits is () and the highest digit of seven digits is ().

12, the largest five-digit plus 1 is (), and the smallest nine-digit minus 1 is ().

13,480000 is ().

146,988,600 yuan, where the maximum capacity in □ is (235,000,0024 yuan, and the minimum capacity in □ is ().

15, of the six digits consisting of 8, 5, 0, 0, 9 and 2, the largest is () and the smallest is ().

16, there is a number, its tens of millions and thousands of digits are 9, and the rest of the digits are 0.

(1) This number is written as ().

This number is pronounced ().

(3) This number is () digits, and the counting unit of the highest digit is ().

(4) This number is rounded to ten thousand places, which is about ().

17. Round two numbers to 10000 respectively, which is about 50000, and the difference between the two numbers is 5, where

One is more than 50 thousand, and the other is less than 50 thousand These two numbers are () and ().

Second, multiple-choice questions (fill in the correct answer serial number in brackets, 4 points for each question, *** 16 points)

1, one, ten, hundred, thousand, ten thousand is ()

A, counting method B, digital name C, counting unit

2. Fill in the appropriate number 490,438.5 million in brackets. ()

a、0~4B、0~5C、5~9

Add () 0 between 5 and 6, and the number will become 500.6.

a、6B、7C、8

4. Use a six-digit number consisting of three 7s and three 0s. When reading, no 0 will be read. This number is ().

777000B、700077C、707070

5. The smallest natural number is ().

① 0② 1③ No.

6. Below () is the clear key on the electronic calculator.

①SE/T②MC③CE

7, the following statement is correct ().

Units, tens, hundreds and thousands are all counting units.

②493600 The mantissa after omitting 10000 is about 49.

③ 604000 consists of six hundred thousand and four thousand.

8. The next number that doesn't read zero is ().

① 700030② 703000③ 700300

9. () One million is one hundred million.

① 10② 100③ 1000

10, two 1 and three 0s can form () different five digits.

countless

1 1, the following statement is wrong ().

(1) The two adjacent units of 100,000 bits are 1 million bits and 10,000 bits respectively.

② 200 1 10320,000.

③ The number consisting of ten thousand, one thousand and ten is10000100010.

12 and 7040600 are pronounced as ().

① 7040602 7040603 704600

Three. Judgment (2 points for each question, * * * 8 points)

Nine of the two numbers 1 and 94200 stand at 10,000 points. ()

2,40300, write 40000300. ()

3. The planning units of integers are only: one, ten, one hundred, one thousand, ten thousand, one hundred thousand, one million and ten million. ()

4、 100000- 1 99999+ 1( )

IV. Comparative size (12)

72 108 9675438+03579006 170006200 10 1 109999.

4762504 ○ 476251340 million ○ 990890108910/

5. Read the numbers below. (12)

708500 Reading: 70000508 Reading:

100090009 pronunciation: 5060032 pronunciation:

6. Write down the following figures. (12)

560,056 writing:

770,108,800 Writing:

Four million seven hundred and eighty-nine thousand six words:

Chapter one hundred and twenty-three Writing:

7. Use a calculator and tell me what rules you have found. (10)

12 10 1= 13 10 1= 14 10 1= 15 10 1=

16 10 1= 17 10 1= 18 10 1= 19 10 1=

Eight, use 2, 3, 4, 0, 0 to form a maximum five-digit number and a minimum five-digit number, and find their sum. (10)