ya ... right answer is tvb now,tvbnow,bttvb$ C5 }" C* `+ y. Q, V! g: y
a)$60-$55=賺左$5$ J' o3 U5 W! y3 Z; O8 U
4 M: ]- ]: H+ J; wb)$60-$62=花多左$2' r& o2 ^, W3 r* ]
: c4 H+ S" v9 _5 O: |+ I
c)$68-$62=賺左$6
# _5 s4 ]; d& O, ptvb now,tvbnow,bttvb3 o* W3 H" C5 n2 c/ Y) Z: ?$ {0 L
所以:$5-$2+$6=$9 |