若是实数，，则-八年级数学

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• 若，则的值为-九年级数学
• 若︱a-2︱+=0，则a2-b=．-八年级数学
• 计算：．-八年级数学
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• 计算：．-九年级数学
• 计算：-七年级数学
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• －的相反数是（）A．B．－C．D．-九年级数学
• 化简的结果是▲。-八年级数学
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• 计算-九年级数学
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• 计算：-九年级数学
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• 若-八年级数学
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