let's start with some simple ones

送交者: Enlighten 于 2008-01-11, 09:49:10:

回答: and your question was 由 squirrel 于 2008-01-11, 09:15:34:

8km,3.0000000s=2.66=2.7km/s
this is because 8km is actually 7.5 to 8.5 so the actual speed could be from 2.5 to 2.8. so 2.7km/s is the correct answer since it would be meaningless to go to 2.67 when the fact could be 2.5 or 2.8.

so the rule should be to have one more digit than the smallest number of digits in the original data.

所有跟贴:

2.7km/s = 2.7m/ms, is this correct? (无内容) - squirrel (0 bytes) 2008-01-11, 10:41:31 (197290)
- i think so. if you think of it as 8x10^3 m / 3x10^3 ms. (无内容) - Enlighten (0 bytes) 2008-01-11, 10:49:51 (197295)
  - 2.7km/s = 2.7m/ms = 0.0027km/ms - squirrel (143 bytes) 2008-01-11, 10:56:33 (197299)
    - i'm not sure. but i think you can't say - Enlighten (217 bytes) 2008-01-11, 11:04:17 (197302)
      - ok, i think the problem arises when you use m and ms. - Enlighten (184 bytes) 2008-01-11, 11:07:13 (197303)
        
        You gave "3.0000000s", not 3s. - squirrel (79 bytes) 2008-01-11, 11:09:48 (197307)

加跟贴