化简：27+12+43=______．-数学

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• （1）计算：（2）化简：-八年级数学
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• 计算+的值为[]A．9B．3C．3D．5-八年级数学
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• 计算：（）。-九年级数学
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• 下列运算正确的是[]A.a2·a3=a6B.+=2+C.（x﹣2）（x+3）=x2﹣6D.（﹣a）2=﹣a2-九年级数学
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• 下列运算中，结果正确的是[]A．B．C．D．-九年级数学
• 计算：[]A.3B.C.2D.4-九年级数学
• 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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• 计算：-八年级数学
• 计算的结果是[]A．6B．C．2D．-八年级数学
• ①计算：②解方程组：．-八年级数学
• ﹣=（）。-八年级数学
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• 下列计算正确的是[]A．B．C．D．-八年级数学
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• 化简的结果是[]A．B．2C．D．1-八年级数学
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• 计算：(1)；(2)求x的值：．-八年级数学