升f.1maths~

小key

2009-08-28 10:06 am

桌子一張,標價$1320,店主願意以9折售給小明,經彼此議價後,店主終於再-$132,完成是項交易,問小明實獲折扣多少?
列式:_______________________________=__________( )
----------------------------------------
定價售價折扣平了
_______ 90% 75折 ________
$250 _______ less18% ________
_______ $135 9折 ________
$180 _______ 9折9扣 ________
$450 $315 _______ ________
$250 _______ 雙6折 ________
_______ $171 5%off ________
-----------------------------------------------
thx~~~^^

回答 (1)

※Tony Cheung※

2009-08-28 2:37 pm

✔ 最佳答案

桌子一張,標價$1320,店主願意以9折售給小明,經彼此議價後,店主終於再-$132,完成是項交易,問小明實獲折扣多少?
小明實獲折扣
= (1320*0.9-132)/1320*100%
= 1056/1320*100%
= 80%
= 8折

定價售價折扣平了
$120 $90 75折 $30
$250 $205 less18% $45
$150 $135 9折 $15
$180 $145.8 9折9扣 $34.2
$450 $315 7折 $135
$250 $90 雙6折 $160
$180 $171 5%off $9

* 9折9扣= 90%*90%= 81%
* 雙六折= 60%*60%= 36%

100%原創

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