ya ... right answer is
" v- L! u. K7 Q3 s5.39.217.77:8898a)$60-$55=賺左$5tvb now,tvbnow,bttvb& }( w2 l6 f# n: k8 N' _
; R* O2 Y! O" e) |, G6 ~8 E
b)$60-$62=花多左$2tvb now,tvbnow,bttvb: A. `/ U& N$ ]0 Y' Z
: l2 j- P0 m9 A/ i5.39.217.77:8898c)$68-$62=賺左$6
2 p" c+ ?8 o! s6 L3 Qtvb now,tvbnow,bttvb
; E# M1 v+ B6 K5 Q5 c6 d# vtvb now,tvbnow,bttvb所以:$5-$2+$6=$9 |