求下列各題變化後的值:(百分數)
A.120增加20%後減少20%
B.96減少50%後增加30%
唔該我想要列式
數學題...............
2006-11-10 4:27 am
回答 (6)
2006-11-10 4:37 am
✔ 最佳答案
A (120x1.2)x0.8=144x0.8
=115.2
B (96x0.5)x1.3
=48x1.3
=62.4
2006-11-10 5:21 am
120(1+20\100)(1-20\100)
96(1-50\100)(1+30\100)
96(1-50\100)(1+30\100)
2006-11-10 5:10 am
A =120(1+20%)(1-20%)
=115.2
B =96(1-50%)(1+30%)
=62.4
=115.2
B =96(1-50%)(1+30%)
=62.4
2006-11-10 4:32 am
120(1+20\100)(1-20\100)
96(1-50\100)(1+30\100)
96(1-50\100)(1+30\100)
2006-11-10 4:31 am
A.120*(1+20%)*(1-20%)
B.96*(1-50%)*(1+30%)
B.96*(1-50%)*(1+30%)
收錄日期: 2021-04-12 22:52:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061109000051KK03818