The coldest temperature ever recorded on earth (at Vostok station in Antarctica) is $$-89^{}\circ\text{C}$$.  The hottest temperature ever recorded (it was somewhere in Libya) is $$58^{}\circ\text{C}$$.  By how many degrees Celcius is the \textquotesingle hottest hot\textquotesingle{} greater than the \textquotesingle coldest cold\textquotesingle?  Answer :~\uline{~~~~~~~~~~}~$$^{}\circ\text{C}$$ 
Overseas Competition->Knowledge Point->Calculation Modules->Negative Numbers->Operations on Negative numbers