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2008-09-24 3:12 am

[(+5)(-3)+(-2)(+7)] 除 (-2)

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回答 (3)

2008-09-24 3:17 am

✔ 最佳答案

[(+5)(-3)+(-2)(+7)]除(-2)
=[-15+(-14)]除(-2)
=(-29)除(-2)
=14.5
(唔知岩唔岩....但係我諗係咁樣做)

參考: me

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2008-09-24 3:38 am

[(+5)(-3)+(-2)(+7)]/(-2)
=[(+2)+(-2)(+7)]/(-2)
=[0+7]/(-2)
=7/(-2)
=(-3.5)

參考: ???

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2008-09-24 3:18 am

[(+5)(-3)+(-2)(+7)] 除 (-2)
=[(-15)+(-14)]除2
=(-29)除2
=-14.5

參考: me

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