下列计算正确的是[]A.B.C.D.-九年级数学

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• 计算：-九年级数学
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• 下列计算中，正确的[]A.B.C.D.-九年级数学
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• 计算：-九年级数学
• 下面计算正确的是[]A.B.C.D.-九年级数学
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• 计算：（）。-九年级数学
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