21+50+15=86
1 \8 [- A+ x, m& }& `公仔箱論壇why 86...
! y+ Z$ n( s! ]5 g; {2 F) oTVBNOW 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。becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
: ?$ p+ N! ~, Tthen he giv bck his fren 50
- r2 `" N% N3 f7 Q+ pand the shoes cost is 15TVBNOW 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。6 W% K ~/ z+ v3 e' V) T% F: K7 N
9 I. O6 P8 X& m: m5.39.217.77so total he loss is 86...
5 |' X* t( g, g2 d! A4 t) J5.39.217.775.39.217.77% i6 h! [/ D+ E# m( p
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |