小學數學題?急急急急急急急急

2010-05-12 12:12 am
媽媽購買一個蛋糕,妹妹吃了整個蛋糕的30%,哥哥吃了50%,哥哥比妹妹多吃 %

回答 (7)

2010-05-12 2:33 am
✔ 最佳答案
哥哥比妹妹多吃:
50%-20%
=30%
答:哥哥比妹妹多吃30%
2010-05-12 1:42 am
哥哥比妹妹多吃 L%

= [ (哥吃了 - 妹吃了) / 妹吃了 ] x 100%

[(50% - 30%) / 30%] x 100%

= (20% / 30%) x 100%

= (2/3) x 100%

= (200/3)%

= 66.66......%

= 66.67% (準確至兩位小數)
參考: yahoo
2010-05-12 12:56 am
哥哥比妹妹多吃 %
= [ (哥哥吃了的%-妹妹吃了的%) / 妹妹吃了的%] X 100%
= [(50%-30%) / 30%]X100%
= (20/30)X100%
= 66.666666666666666666666666666666666666666666666666666666666%
~ 66.7% (取三個有效數字)
2010-05-12 12:31 am
整個係100%
哥哥食左50%
妹妹食左30%
哥哥比妹妹多吃%:
50%-30%
=20%
參考: 自己
2010-05-12 12:28 am
哥哥比妹妹多吃 %

= [ (哥吃了 - 妹吃了) / 妹吃了 ] x 100%

[(50% - 30%) / 30%] x 100%

= (20% / 30%) x 100%

= (2/3) x 100%

= (200/3)%

= 66.66......%

= 66.67% (準確至兩位小數)





2010-05-11 16:29:45 補充:
哥哥比妹妹多吃 66.67% (準確至兩位小數)

2010-05-11 16:31:04 補充:
唔係就咁減架!!

001 002 唔好教錯人。
2010-05-12 12:25 am
哥哥比妹妹多吃(50-30)%
=20%

2010-05-15 12:03:13 補充:
令人最看不明白的答案竟然定做正確答案了~~
2010-05-12 12:24 am
50%-30%
=20%


收錄日期: 2021-04-13 17:14:51
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100511000051KK00659

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