標題:
數學題 20點
發問:
Calculate2008分之2009x2007分之2008x2006分之2007x...x2分之3x1分之2 . Briefly explani how you get the answer. 更新: 唔明? 唔好玩呀 更新 2: find the values of following expressions (a)9% of 100L (b)65% of 20m (c)52% of 40Kg (d)0.5% of $5000 更新 3: Marked price:_________ Selling price:_________ Discount:$200 Discount percentage:10% There are 50 staff in a company.If 20 of them are female,find the percentage of male staff in the company. Hint Find the number of male staff in the company first. 更新 4: The marked price of an LCD television is $12000.If a discount percentage of 30% is offered,find the selling price.
此文章來自奇摩知識+如有不便請留言告知
最佳解答:
(1)2008/2009x2007/2008.......x3/2x2/1 =2009x2008/2008...x1/1 =2009 (a)100Lx9%=9L (b)20mx65%=13m (c)40Kgx52%=20.8Kg (d)$5000x0.5%=$25 Marked price:$2000 Selling price:$1800 Discount:$200 Discount percentage:10% (50-20)/50x100% =30/50x100% =3/5x100% =60% ∴the percentage of male staff in the company is 60%. 12000x(1-30%) =12000x70% =8400 ∴the selling price is $8400.
其他解答:
2009 (a)9L (b)13m (c)20.8Kg (d)$25 Marked price:$2000 Selling price:$1800 The percentage of male staff in the company is 40%. The selling price is $8400|||||????????????????????????????????????????????????????????????????
留言列表
