21+50+15=86
7 f) d2 M: P7 q) x8 ]; p; z' ~% Y. [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。why 86...7 R) q0 v$ I' k( x8 S M
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
4 v1 _* e5 m9 c4 qtvb now,tvbnow,bttvbthen he giv bck his fren 50公仔箱論壇% S% Z& Q% `% _0 }: y" B
and the shoes cost is 15
3 u5 g+ q" s( q. c# b! \公仔箱論壇
; t5 E; T- T: Wso 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。, ?5 H5 X# Z6 G* x5 J
公仔箱論壇7 Y0 e/ J. i7 I z4 G; X
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |