ya ... right answer is 公仔箱論壇: u2 g- E* `% @" a4 d4 N
a)$60-$55=賺左$5) F3 x$ Q* l# _9 l9 G. H+ i
5.39.217.76* Y: ?, Q4 P& |9 Z5 a$ E; a
b)$60-$62=花多左$2
7 K3 | h9 @2 O! }! h7 Ztvb now,tvbnow,bttvb" D1 ^% L( E7 Z- n# t, D
c)$68-$62=賺左$6
% H$ j5 z% d2 i9 ~tvb now,tvbnow,bttvb
% X% [! ~3 o+ p- @+ Otvb now,tvbnow,bttvb所以:$5-$2+$6=$9 |