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~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。3 W. j; G {% }# P0 Y5 Z# C6 v
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[ 本帖最後由 carsonchan 於 2009-2-15 04:18 PM 編輯 ] |