2.6006006 bit 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 six digits that make up one are ().

6. Write the following figures in "ten thousand".

89000000=785000≈509000≈

7. Write the following figures in units of "100 million".

500000000=9958200000≈742 1305678≈

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 ... Yes ()

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

2. Fill in the appropriate figures in the brackets of 49 □ 438 ≈ 500,000. ()

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

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