數學..唔該!!!!列埋式..唔該

2007-01-03 4:47 am
1)a買了2隻手錶給b&c,每隻手錶都以18%的折扣百分率發售.如果手錶每隻售價
$625,問共付了多少元?

2)A店,一個手袋的售價是$450,折扣百分率是10%.1件皮褸的售價是$1225,折扣百分率是20%.各買一件,她需付多少元?

回答 (5)

2007-01-03 4:55 am
✔ 最佳答案
1) (625x2)x(100%-18%)

=1250x82%

=1025

A共付了1025元。

2) 450x(100%-10%)+1225x(100%-20%)

=450x90%+1225x80%

=405+980

=1385

她需付1385元。
參考: 不就是我嘛
2007-01-03 5:23 am
1)
625*(1-18%)*2
=625*72/100*2
=225
答:共付了225元

2)450*(1-10%)+1225*(1-20%)
=450*90/100+1225*80/100
=405+980
=1385
答:她需付1385元

2007-01-02 21:25:06 補充:
sorry..is should be:1)625*(1-18%)*2=625*72/100*2=900答:共付了900元

2007-01-02 21:26:02 補充:
sorry..is should be:1)625*(1-18%)*2=625*82/100*2=1025答:共付了1025元
參考: 我
2007-01-03 5:18 am
1)

625(1-18%) x2

= 625x82%x2

= 512.5 x2

=1025

2)

450(1-10%) + 1225(1-20%)

=450x90% + 1225x80%

=405 + 980

=1385
2007-01-03 4:57 am
1)

625(1-18%) x2

= 625x82%x2

= 512.5 x2

=1025

2)

450(1-10%) + 1225(1-20%)

=450x90% + 1225x80%

=405 + 980

=1385
2007-01-03 4:55 am
2) 她需付:
450*(1-10%)+1225*(1-20%)
=415+980
=1395(元)
參考: Myself


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