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~tvb now,tvbnow,bttvb+ Z& D& h8 i3 R: v: k. Y
' D4 A3 [' I& g" ~0 B2 N& Z6 RTVBNOW 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 ] |