21+50+15=86
. r. i+ v' |1 |- K9 `) b公仔箱論壇why 86...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。$ o( I: L% j& x. X: I: ^; R Z) ?
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21* G" y/ Y y+ @* D: D9 L
then he giv bck his fren 50; @: B/ c3 Q0 o. X' W/ l& ]4 R
and the shoes cost is 15
3 s8 ~; [# X, o8 G z公仔箱論壇
/ ]; Q5 b8 j% x, @9 Z! v5 L" _so total he loss is 86...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。2 F+ e2 l$ W4 M' C) }# E
4 y! g' `+ Z0 n# {- ~5 e
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |