其它
SASMO 2014 P2 Q7  There are 14 children playing "The eagle catches the chicks." One of them is the \textquotesingle eagle\textquotesingle{} while another child is the \textquotesingle mother hen\textquotesingle{} whose job is to protect the \textquotesingle chicks\textquotesingle. The rest of the children are the \textquotesingle chicks\textquotesingle. After a while, the \textquotesingle eagle\textquotesingle{} has caught 5 \textquotesingle chicks\textquotesingle. How many \textquotesingle chicks\textquotesingle{} are still around? 
Overseas Competition->Knowledge Point->Word Problem Modules->Applying Addition and Subtraction
14 - 1 (eagle) - 1 (mother hen) = 12 (chicks)  12 - 5 7 chicks 