cost 15 to make the shoes, gave the boy 29 for change, and need 29 more to pay back the nieghborhood, so 15+29+29= 73. simple ,math problem. much easier than calculus~
- z$ b4 V0 u+ u. C4 g9 _公仔箱論壇
% @* k: K: D" b, ]TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。[ 本帖最後由 carsonchan 於 2009-2-15 04:18 PM 編輯 ] |