簡單百分數問題

a.
妹妹得到的錢:
500*15% + 500*40%*25%
=75+50
=125 (元)


b.
弟弟餘下的錢:
500*40%*(1-25%)
= 500*40%*75%
= 150 (元)

哥哥比弟弟:
500x40%=200
哥哥比妹妹:
500x25%=125
弟弟比妹妹:
200x25%=50
妹妹最後得到:
125+50=175
弟弟最後餘下:
200-50=150
總式：
a)500x15%+500x40%x25%
=500x15/100+500x40/100x25/100
=75+100
=175
b)500x40%x(1-25%)
=500x40/100x75/100
=200x75/100
=150

a.哥哥給妹妹的錢
=500x15%
=$75

哥哥給弟弟的錢
=500x40%
=$200

弟弟給妹妹的錢
=200x25%
=$50

妹妹最後得到
=75+50
=$125

b.哥哥給弟弟的錢
=500x40%
=$200

弟弟給妹妹的錢
=200x25%
=$50

弟弟最後餘下
=200-50
=$150

哥哥給弟弟有款: 500 x 40% = 200元
哥哥給妹妹有款: 500 x 15% = 75元
弟弟分給妹妹: 200 x 25% = 50元

a:妹妹最後得:75 + 50 = 125元
b:弟弟最後餘:200 - 50 = 150元

a:妹妹最後得到:
500*15% 500*40*25%
=75 200*25%
=75 50
=125(元)
b:弟弟最後餘下:
500*40%*(1-25%)
=200*75%
=150(元)

a:妹妹最後得到多少元?
500*15%+500*40*25%
=75+200*25%
=75+50
=125(元)
b:弟弟最後餘下多少元?
500*40%*(1-25%)
=200*75%
=150(元)

firstly
$500 X 40% -->弟弟= $200
$500 X 15% -->妹妹= $75

secondly
弟弟把$200 --> $200 X 25%妹妹也就是$50

lastly
弟弟有$200-$50=$150
妹妹有$75+$50=$125

首先我地先計左弟弟先

弟弟最後餘下:

500×40%×(1-25%)

=200×75%

=$150

然後再計妹妹

妹妹最後得到:

500×15%+150×25%

=75+37.5

=$112.5