數學題...............

2006-11-10 4:27 am

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

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

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2006-11-10 5:21 am

120(1+20\100)(1-20\100)
96(1-50\100)(1+30\100)

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2006-11-10 5:10 am

A =120(1+20%)(1-20%)
=115.2
B =96(1-50%)(1+30%)
=62.4

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2006-11-10 4:32 am

A.115.2
B.62.4

參考: me

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2006-11-10 4:32 am

120(1+20\100)(1-20\100)
96(1-50\100)(1+30\100)

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2006-11-10 4:31 am

A.120*(1+20%)*(1-20%)

B.96*(1-50%)*(1+30%)

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