ya ... right answer is 公仔箱論壇6 v9 w7 M. T N& h
a)$60-$55=賺左$5
, |) N! C3 R4 y* c% S公仔箱論壇# p( i3 D# i# a4 Q. `
b)$60-$62=花多左$2tvb now,tvbnow,bttvb& C0 }2 s: v4 U6 B' E3 Z
tvb now,tvbnow,bttvb/ \) S4 n0 O0 l
c)$68-$62=賺左$6
5 u. I8 ^& t0 m$ y! Etvb now,tvbnow,bttvb
8 T; p0 |1 b8 N. S3 F; ~. I, k5.39.217.77:8898所以:$5-$2+$6=$9 |