數學唔明~請指教下~

Both are incorrect la.
Correct answer should be $140/70%=$200
As the price is $200, then小明 buy it in 70% :
so $200X70%=$140,See?

小明以140元買入一隻以七折出售的手錶。
求該手錶的標價140x70%=yes
140x(1-70%)=no
I唔可以解釋下

140x70%=98
140x70%先對

正確ans.
140x70%=98

2007-02-05 12:18:02 補充：
good ans.

兩個都不對,應該是140÷70% / y(標價)x70%=140

2007-01-28 16:47:02 補充：
/=or

140x70%= 98

140x70%=

如果係英文寫七折的話...30% off...140x(1-30%)=

所以如果係中文...七折....140x70%=

so...係lee個...140x70%=

數學唔明~請指教下~
小明以140元買入一隻以七折出售的手錶。
求該手錶的標價~ 140x70%= 或 140x(1-70%)=
請問邊個先對~你可唔可以解釋下~

140x70%=98

140x70%=

2007-01-28 11:30:03 補充：
=98