引用:
原帖由 mikan85 於 2009-3-15 03:01 AM 發表
really? I used to tutor elementary kids math..and we use both 22/7 and 3.14
but does all those extra decimals at the end make any differences?
In normal usage, it has no big deal
LOL, I forgot about elementary school things
In science, we use the concept of significant figure which matters.
Anyway, more precise one number is, more precise the answer will be