ya ... right answer is 5.39.217.76. M; n& G3 K3 A* o& H* `
a)$60-$55=賺左$5
; r' I+ V& {: R, F( ^: a5.39.217.76$ [8 t5 F |( Y5 S9 T( O
b)$60-$62=花多左$2
' x8 u8 k6 c3 [2 h5.39.217.76
3 z6 S, W4 y7 [( u6 stvb now,tvbnow,bttvbc)$68-$62=賺左$65.39.217.76) p$ X9 Z W( a7 k
6 Z" P2 X" b6 y, \& {. e
所以:$5-$2+$6=$9 |