1. The highest digit of seven digits is (millions of digits), and its counting unit is (one million).

2. Fill in the blanks according to the following information.

The total population of the city is 57 1600, the land area is 32.5 million square meters, and the gross national product is 7563 million yuan.

The land area is 9.76 million square meters.

(1) When the total population is rewritten as "ten thousand", the figure is (57. 16) ten thousand.

(2) The land area is (3,250) hectares.

One day, the temperature in Lanzhou was -5℃, the temperature in Beijing was -7℃, and the temperature in Lanzhou was high.

4. If the average score is 0, then +5 means higher than the average score (5 points) and -2 1 means lower than the average score (2 1 minute). compare

The average score is 7 points higher, which is recorded as (+7).

5. Write the height of 5.95 as three decimal places equal to the original number (5.950), accurate to the tenth place (6.00).

6.60 The decimal number consisting of 0. 1, 8 0.0 1 and 5 0.00 1 is (6.085), including (6,085) thousandths.

7. Use four sixes and three zeros to form a seven-digit number that meets the following requirements.

(1) A seven-digit number that does not read zero. (6666000)

(2) Read only a seven-digit number of 0. (6660600)

(3) Only seven digits of two zeros are read. (6060660)

(4) Read only seven digits of three zeros. (6060606)

(5) the smallest seven digits. (6000666)

(6) the largest seven digits. (6666000)

8. Observe the following figures carefully and answer the following questions as necessary:

5607 10,5067 10,50670 1,70 1056,56070 1,56007 1,675 100,765 100,700 156.

The largest number of (1) is (765 100), and the smallest number is (50670 1).

(2) The number closest to 700,000 is (700 156).

(3) The number greater than 70 1056 is (765 100).

Second, judge a sentence (draw "√" in brackets for the right and "×" for the wrong).

1. Integer is greater than decimal. (×)

2. Read a few zeros for a number and write a few zeros for a number. (×)

3. There are only three negative numbers in 18.05,-14, 0,99, -205, 1. (×)

4. Remove the zero after the decimal point, and the size of the decimal point remains unchanged. (×)

5. One thousandth is more than one percent. (×)

6. The number greater than 0.23 and less than 0.25 is only 0.24. (×)

7.8.85 and 15% can form an integer. (√)

8. There are only nine numbers greater than 0 and less than 10. (×)

9. There are many chickens in the chicken farm, which shows that the number of chickens is a natural number. (√)

10. The integers adjacent to 90000 are 80000 and 100000. (×)

1 1. Simplify 80.090 to get 80.09. (√)

After 12.0.4, there are two "0s" in the sky. Its size and counting unit remain unchanged. (×)

Third, choose one (put the serial number of the correct answer in brackets)

1.0. 10 is counted in (b).

One tenth of a.c.

The "7" in the 23.87 billion yuan stands for (b).

70000000 C

3. Among the following numbers, the number with the same size after removing 0 is (c).

0.085 B.7.360 1 C.3.900

4.78.995 The two decimal places reserved are (a).

79.00

5. On the number axis, -3/4 is on the (A) side of-110.

A. left B. right C. uncertain

6. A number consists of three millions, five thousands and 1 tens. This number is (b).

a . 3050 100 b . 30050 10 c . 3005 100

7. In the following figures, the number that does not read zero is (c).

50000020

8. The nearest integer is (b).

5060 10，000 b . 506065435

9. If the number A = 200,000 and the number B ≈ 200,000, then (c).

A. number a > number B. number a.