GRE数学考点：Evaluating Expressions
<p> <span word="Evaluating">Evaluating</span> <span word="Expressions">Expressions</span></p><p> <span word="To">To</span> <span word="evaluate">evaluate</span> <span word="an">an</span> <span word="expression">expression</span>, <span word="plug">plug</span> <span word="in">in</span> <span word="the">the</span> <span word="specific">specific</span> <span word="values">values</span> <span word="for">for</span> <span word="the">the</span> <span word="variables">variables</span> <span word="and">and</span> <span word="simplify">simplify</span>.</p><p> <span word="Example">Example</span></p><p> <span word="For">For</span> <span word="x">x</span>=2, <span word="the">the</span> <span word="expression">expression</span> 3<span word="x">x</span>+5 <span word="evaluates">evaluates</span> <span word="to">to</span> 32+5=11.</p><p> <span word="For">For</span> <span word="x">x</span>=2 <span word="and">and</span> <span word="y">y</span>=1, <span word="the">the</span> <span word="expression">expression</span> <span word="xy">xy</span>/ <span word="evaluates">evaluates</span> <span word="to">to</span> 21/=2/3.</p><p> <span word="For">For</span> <span word="x">x</span>=2, <span word="the">the</span> <span word="expression">expression</span> 4<span word="yx">yx</span>/ <span word="evaluates">evaluates</span> <span word="to">to</span> 8<span word="y">y</span>/.</p><p> <span word="Remember">Remember</span></p><p> <span word="After">After</span> <span word="evaluation">evaluation</span> <span word="the">the</span> <span word="expression">expression</span> <span word="does">does</span> <span word="not">not</span> <span word="contain">contain</span> <span word="the">the</span> <span word="variable">variable</span> <span word="in">in</span> <span word="any">any</span> <span word="form">form</span>.</p><p> 有一部分考生认为新<span word="GRE">GRE</span>数学具有一定的难度，这其中的原因是由于考生在复习时没有把新<span word="GRE">GRE</span>数学的基础打牢。想要新<span word="GRE">GRE</span>数学考好，复习的时候一定要把基本概念和重要考点都弄扎实。祝大家都能取得理想成绩!</p><p> </p><p> </p>
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