ya ... right answer is
% B1 F. u5 k Ba)$60-$55=賺左$5
6 A" F& S' S+ q! k J2 m# k3 G; _0 n' N# N) c/ v# l f8 |+ ^
b)$60-$62=花多左$2
8 z! @' ]. k' k8 c6 K; Aos.tvboxnow.comtvb now,tvbnow,bttvb8 {; _: E/ D) k, `6 ?' f, t
c)$68-$62=賺左$6tvb now,tvbnow,bttvb% M Y1 F' m& ?* T m
) @; s! d! O4 o, ?/ W) _7 V
所以:$5-$2+$6=$9 |