(1)10 one thousand is (); 10 () is 100 million.

(2) From the unit, the ninth place is (), and its counting unit is ().

(3) The ratio between every two adjacent counting units is 10. This counting method is called () counting method.

(4) The highest digit of1978523040 is (), which is (); Where 5 stands for ().

5] A number, its. One hundred million bits are 1, millions are 7, hundreds are 5, and the rest are 0. This number is written as () and pronounced as ().

[6] Write the following figures as required: the smallest nine digits (), the largest seven digits (), 1 the number less than 100000 ().

Once 49 □ 800 ≈ 490,000, □ can be filled in ().

39 □ 8000000 ≈ 4 billion, □ can be filled in ().

Become 6800000000 = () million = () billion.

(9) Arrange the following figures in descending order. 8080 18080 80 1 808 8 1 8008 18 88 18008

⑽ What are the integers greater than 99996 and less than 100003? Please write it down in order:

2. Judge, it's right and wrong.

(1)1283 million write 128300004. ()

2 4099200≈465438+ ten thousand. ()

(3) The smallest six digits are11111. ()

(4) Write a minimum of five digits with 5,8, 1, 2,0 as 12580. ()

3. Choose and put the serial number of the correct answer in brackets.

(1) The number consisting of 2 tens of millions, 3 tens of thousands and 5 hundreds is ().

a、20035000B、20030500C、200030500D、23500

② Ten million is 100 ().

A, million b, million c, hundred thousand d, thousand

(3) Among the following four numbers, the number that reads only one zero is ().

a、54600000B、6080000000C、5030020D、0500002

(4) Add () zeros between 7 and 8. This number reads: 7 billion 08.

a、9B、8C、7D、6

5] The smallest six-digit ratio is the largest five-digit ratio ().

A, small 1B, large 90000C, large 1D, large 99999.

4. Rewrite the following figures into "10,000" units.

650000=35000000=

5500000000=498000 100=

475480=254000=

5. Rewrite the following figures into "1 100 million" units.

32700000000= 19000000000=

3500000000=7254000000=

59000000=9960000000=

6. Fill in "=" or ""in 0.

3,000,000,003,000,796,000,000,800.

405000000040500080000000

7. A brick factory produces150,000 bricks in the first month,144,000 bricks in the second month, and140,000 bricks in the third month. How many tens of thousands of bricks are produced in the first quarter?