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已知,则代数式=()-八年级数学
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计算:(1)=()(2)=()(3)=()(4)=()-八年级数学
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先化简,再求值:其中x=-3。-八年级数学
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化简求值:当x=﹣2时,式子=()。-八年级数学
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化简:[+÷(+)2]×=()-八年级数学
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已知的值为()。-八年级数学
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先化简后求值,其中a=﹣2,则(1+)(a2﹣1)=()。-八年级数学
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化简:=()。-八年级数学
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化简求值:当时,÷=()-八年级数学
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化简求值:当x=﹣2时,式子=()-八年级数学
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计算的正确结果是[]A.B.1C.D.-1-八年级数学
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(1)计算:++(﹣1)0﹣2sin45°=()(2)化简:=()-八年级数学
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先化简,再求值:,其中,则它的值为().-八年级数学
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分式和的最简公分母为()。-八年级数学
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先化简,再求值。,其中x=-2009。-九年级数学
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My son set out _____ questions when I set about ______lessons.A.asking; preparingB.to ask; to prepa
题目简介
计算:(1)(2)-八年级数学
题目详情
(2)
答案
=
(2)原式