Meaning of 差 in 现在差一刻九点? I have difficulties understanding sentence.
What is meaning of 差 in the following sentence?


  我看一下，现在差一刻九点。
It literally means differ. 差一刻九点 means a quarter to nine. 差 in the phrase 差一点 and 差几块钱/几个月 means the same, that is, adding the amount missed will turn the current situation into the target situation (could be better or worse).