21+50+15=86
/ ^! o0 a1 R4 f3 J7 v* C, V9 [why 86...
' s4 ]: A. y' ]2 f. b3 X' @" j nTVBNOW 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 21tvb now,tvbnow,bttvb6 b% m1 A# L( a) }$ G
then he giv bck his fren 50
) v5 S: W* I- g" x+ Y' Dand the shoes cost is 15
( Z: Z9 a( B+ D: D
# r7 {; A7 p* ^- vso total he loss is 86...0 W' E9 I F8 p5 j+ I) c* P' Y
R8 j* u9 [/ `# y4 n9 q2 J1 R
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |