21+50+15=86TVBNOW 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。& a9 h! G' n& O2 W2 L% _( x& l
why 86...公仔箱論壇, K' D P4 K$ F, C2 w0 S
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
* [8 n7 f o! L7 {& L' ? qthen he giv bck his fren 50: y* c- l1 R3 I p
and the shoes cost is 15
# P7 g' W! H( r& |% a* f7 k公仔箱論壇
0 A) h8 Q+ c: w/ O9 E, C公仔箱論壇so total he loss is 86...
1 L( W2 S* V0 z3 ~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。" d! u) x" f3 j1 O( t1 P
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |