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~9 |7 d B ]8 J6 [5 L
! z. G' g9 |" m# q公仔箱論壇[ 本帖最後由 carsonchan 於 2009-2-15 04:18 PM 編輯 ] |