GRE数学考点题目：Adding Monomials
<p> <span word="Adding">Adding</span> <span word="Monomials">Monomials</span></p><p> <span word="To">To</span> <span word="add">add</span> <span word="two">two</span> <span word="monomials">monomials</span> <span word="of">of</span> <span word="the">the</span> <span word="same">same</span> <span word="variables">variables</span> <span word="just">just</span> <span word="add">add</span> <span word="the">the</span> <span word="coefficients">coefficients</span>.</p><p> <span word="Only">Only</span> <span word="two">two</span> <span word="like">like</span> <span word="monomials">monomials</span> <span word="can">can</span> <span word="be">be</span> <span word="added">added</span> <span word="together">together</span>.</p><p> <span word="Example">Example</span>:</p><p> <span word="By">By</span> <span word="adding">adding</span> 3<span word="x">x</span> <span word="and">and</span> 4<span word="x">x</span>, <span word="we">we</span> <span word="get">get</span> <span word="x">x</span>=7<span word="x">x</span>.</p><p> <span word="By">By</span> <span word="adding">adding</span> 3<span word="xy">xy</span>+2<span word="xy">xy</span>, <span word="we">we</span> <span word="get">get</span> <span word="xy">xy</span>=5<span word="xy">xy</span>.</p><p> <span word="By">By</span> <span word="adding">adding</span> <span word="as">as</span> <span word="and">and</span> <span word="bx">bx</span>, <span word="we">we</span> <span word="get">get</span> <span word="ax">ax</span>+<span word="bx">bx</span>=<span word="x">x</span>.</p><p> <span word="Remember">Remember</span>:</p><p> <span word="Monomials">Monomials</span> <span word="can">can</span> <span word="be">be</span> <span word="added">added</span> <span word="only">only</span> <span word="if">if</span> <span word="they">they</span> <span word="have">have</span> <span word="the">the</span> <span word="same">same</span> <span word="variables">variables</span> <span word="with">with</span> <span word="identical">identical</span> <span word="powers">powers</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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