Shanghai covers an area of 6,300 square kilometers, and the peak passenger flow of Spring Festival travel rush in Shanghai Station is 654.38+0.2 million.

1, Shanghai covers an area of 6,300 square kilometers;

2. The peak passenger flow of Spring Festival travel rush in Shanghai Station is 6.5438+0.2 million;

3. The population of China is 654.38+03 billion;

4. Lightning travels 300,000 kilometers per second;

In 2008, the population of Beijing was16.33 million;

6. 1998 The output value of a factory is about150,000 yuan, which is about 12 times.

7. From 65438 to 0999, China's national economy grew by 7.8%.

8. The traffic on the road is about 20,000 vehicles a day.

9. An adult should drink about 1 liter of water every day.

10 and 20 1 1 year, there are tens of thousands of civil servants according to national statistics.

Extended data

Approximation is a number close to the exact number, which is the most original data. Approximation is a number that is not much different from the exact data after rounding.

For the divisor method, you only need to master the rounding method. The application foundation of this method needs to master the understanding of numbers, count the digits of numbers and know where the numbers are. If the number after 10,000 is omitted from 1345680, what is the approximate number of 10,000?

Count to 10000 first, starting from the rightmost single digit 0 of 1345680, where 10000, 10000 and10000 are the numbers 4. Look at the first number on the right of 4, which is 5, greater than or equal to 5. Add 1 to 10000 digits, that is, enter 1, discard the following digits and rewrite them as 0. If the number after 10,000 is omitted from 1344680, then this number is 4, and the first number to the right of 4 is less than 50,000. All the numbers after 10,000 are discarded, and the approximate number after writing 0 is 1340000.

Not only the approximation of large numbers is written in this way, but also the approximation of decimals. The premise of rounding method is to learn to read decimals and decimal places.