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计算:20+2﹣2=()-七年级数学
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下列计算正确的是[]A.(﹣1)0=﹣1B.(﹣1)﹣1=1C.D.(﹣a)2÷(﹣a2)=1-七年级数学
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用分数表示(﹣7)﹣2为().-七年级数学
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下列运算中,正确的是[]A.00=1B.a2·a3=a6C.(a2)3=a6D.(3a)2=3a2-七年级数学
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如果(x﹣2)0有意义,那么x的取值范围是[]A.x>2B.x<2C.x=2D.x≠2-七年级数学
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(π﹣3.14)0=().-七年级数学
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计算(2004﹣π)0的结果是[]A.0B.1C.2004﹣πD.π﹣2004-七年级数学
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计算:.-七年级数学
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若2x=,则x等于[]A.5B.﹣5C.4D.﹣4-七年级数学
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若5k﹣2=1,则k=().-七年级数学
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