计算：a5b4•（a2b）-2÷a3．-数学

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• 计算：①8+|-2|-20120+（12）-1②12313÷213×125③239x-（6x4-2x1x）④（1-2）2-3-63．-数学
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• 计算：（-12）-2+（3-5）0=______．-数学
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• 计算：（12）-1-|-3|+20070．-数学
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• 句子改错。 下面每个句子都有一处错误，改正错误仅涉及一个单词的增加、删除或修改三种形式。增加：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。 删除：把多余的-高一英语
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• 计算：4-20120+2-1．-数学
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• . --- This book by Tony Garrison is of great use for our course. --- But I think his latest one is__
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• ①计算：(2-π)0-|-2|×(12)-1-(-1)2012+(-13)-2②解方程：xx-2-3x+2=1．-数学
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• （探究题）已知：S=1+2-1+2-2+2-3+…+2-2005，请你计算右边的算式求出S的值．-数学
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• 下列计算正确的是（）A．x6x3=x2B．(3x-4)-2=19x8C．a12a-13=a-16D．（2+x）0=1-数学
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• 计算：4sin60°-(π-3)0-18+(12)-1．-数学
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