碑个铁一样的答案你:公仔箱論壇7 R/ T- ^9 O% }, j( B
假设你本身有12蚊.+ p _' l. U2 q2 g3 f0 V
8蚊买,仲有4蚊系袋.5.39.217.77:8898) k- ` z: s- Q, N: C5 A
9蚊卖。又有返13蚊; w0 V0 p& t! N; t; x
10蚊买,剩低3蚊,5.39.217.77:8898" x- l9 ^: ]5 [ u/ j' v* u
11卖,又有返14蚊系袋,5.39.217.77:8898) h( X% }+ A* U0 C* Y6 J% Z7 o/ s
14-12=2.8 O- |* a2 D; c
铁一般的证明!!!!!!!!!!9 A8 S$ x5 Q" S; N% [! V, E
实在太多人答岩咗,楼主唔敢讲答案》?????? |