化简：.-九年级数学

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• 化简：=；=．-八年级数学
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• 计算：．-八年级数学
• 化简：；=．-九年级数学
• 当时，二次根式有意义．-九年级数学
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• 计算：_▲_；-九年级数学
• 计算：（）。-九年级数学
• -九年级数学
• 的算术平方根是()A．6B．±6C．D．±-八年级数学
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• .设a为的小数部分，b为的小数部分.则的值为().A．+-1B．-+1C．--1D．++1-八年级数学
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• -九年级数学
• 使有意义的的取值范围是(▲)．A．B．C．D．-九年级数学
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• 已知,则=________。-九年级数学
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• 的值等于(▲)．A．3B．C．D．-九年级数学
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• 使有意义的的取值范围是-八年级数学
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