21+50+15=86
2 v! F! t2 _; e$ b- atvb now,tvbnow,bttvbwhy 86...公仔箱論壇% K# I. r* E ^# ^& `
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
( N" y5 X. z) u, H W+ n0 J1 @tvb now,tvbnow,bttvbthen he giv bck his fren 50
& B a/ z: Z, e' g# aand the shoes cost is 15
6 i" w9 |' G6 K: n0 [8 GTVBNOW 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。
' Q+ k; G+ Q0 D2 ~# u! g; \: W公仔箱論壇so total he loss is 86...
& b% R# S* `* `4 c公仔箱論壇tvb now,tvbnow,bttvb. }' a. P4 F5 T. M4 C
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |