21+50+15=86
7 y8 e/ i4 w) z: U. y rtvb now,tvbnow,bttvbwhy 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: A0 N% r9 B4 t# V$ b! d
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
; P. T2 G/ u( f公仔箱論壇then he giv bck his fren 50
0 p2 E* v4 S- kand the shoes cost is 15
; K s- T% Y5 D& F公仔箱論壇9 e) V- r Z+ L. b/ P
so total he loss is 86...
9 _4 V G) p8 Y( ?; [9 K/ {1 y! ~4 p; ]0 q( U F
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |