問題about maths

2007-01-15 6:51 am
雙人床一張原價2552元,現以七五折出售,即便宜了_______元。唔識計.點做

回答 (4)

2007-01-15 7:05 am
✔ 最佳答案
雙人床一張便宜了:

$2552 x (1 - 75%)

= $2552 x 25%

= $2552 x 0.25

= $638 //
2007-01-15 7:27 am
2552 - 2552(0.75)

=2552 - 1914

=638

便宜了 $638.
2007-01-15 6:58 am
便宜了的數目
= 原價 - 折實後價錢
= 2552 - 2552 X (75%)
= 2552 - 1914
= 638
2007-01-15 6:58 am
2552 x (100-75)% = 2552 x 25% = 638
即便宜了 638元。


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