计算：4﹣2=（）-七年级数学

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• 计算：（﹣）﹣2﹣20030=（）．-七年级数学
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• 计算：（1）（2）（4ab2）2×（﹣a2b）3-七年级数学
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• 填写下表，并观察下列两个代数式值的变化情况：（1）随着n的值逐渐变大，两个代数式的值如何变化？（2）估计一下，随着n的值逐渐变大，哪个代数式的值先小于10﹣10？-七年级数学
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• 在下列计算中，正确的是[]A．（ab2）3=ab6B．（3xy）3=9x3y3C．（﹣2a2）2=﹣4a4D．（﹣2）﹣2=-七年级数学
• 3﹣2=（），（﹣2）0=（）-七年级数学
• =（）．-七年级数学
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• 计算（2007﹣π）0+=()-七年级数学
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• 2﹣2的值是[]A．﹣4B．4C．D．﹣-七年级数学
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