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		<h1>ĐỀ THI KHẢO SÁT CHẤT LƯỢNG - TOÁN LỚP 8</h1>
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			<div style="text-align: center;"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="FR" style="font-size:16.0pt">ĐỀ THI KHẢO SÁT CHẤT LƯỢNG</span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">M«n to¸n 8</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">Thêi gian lµm bµi 60 phót</span></span><span style="font-size:14.0pt">(Không kể thời gian phát đề)</span></span></span></div>
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Họ và tên:………………………..</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"></span></span>

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						<div class="shape" style="padding:4.35pt 7.95pt 4.35pt 7.95pt" v:shape="_x0000_s1026"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="z-index:251657728"><span style="position:absolute; width:130px"><span style="left:498px"><span style="top:-24px"><span style="height:102px"><span style="position:absolute"><span style="z-index:251657728"><b><i><span style="font-size:14.0pt">Điểm</span></i></b></span></span></span></span></span></span></span></span></span></span></div>
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<b><i><span style="font-size:14.0pt">Lớp ……</span></i></b><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u>Bài làm</u></span></i></b></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 1(3 điểm). </span></i></b><span style="font-size:14.0pt">Giải các phương trình sau:</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="PT-BR" style="font-size:14.0pt">a) </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image002.gif" style="width:164px; height:41px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.gif" style="width:217px; height:44px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">..................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="PT-BR" style="font-size:14.0pt">Câu 2(2 điểm).</span></i></b><span lang="PT-BR" style="font-size:14.0pt"> Cho phân thức </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image006.gif" style="width:61px; height:41px" /></span></span></span></span></span>

<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">Tìm điều kiện của x để giá trị của phân thức được xác định.</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">Tìm giá trị của x để giá trị của phân thức bằng 1.&nbsp;&nbsp; </span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">...........................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="PT-BR" style="font-size:14.0pt">Câu 3(2 điểm).</span></i></b><span lang="PT-BR" style="font-size:14.0pt"> Một đội thợ mỏ theo kế hoạch phải khai thác một lượng than. Họ dự định mỗi ngày khai thác 50 tấn. Nhưng trên thực tế đội đã tăng năng suất nên mỗi ngày khai thác được 57 tấn. Do đó không những họ đã hoàn thành trước thời gian dự định 1 ngày mà còn vượt chỉ tiêu 13 tấn. Tính số than mà đội phải khai thác theo kế hoạch?</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">...........................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">...........................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="PT-BR" style="font-size:14.0pt">Câu 4(3 điểm).</span></i></b><span lang="PT-BR" style="font-size:14.0pt"> Cho </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.gif" style="width:45px; height:19px" /></span></span></span><span style="font-size:14.0pt">&nbsp;vuông tại A có AB = 4,5cm và BC = 7,5cm. Kẻ đường cao AH (H</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image010.gif" style="width:13px; height:13px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">BC). Phân giác của </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image012.gif" style="width:16px; height:23px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">cắt AC tại D, cắt AH tại K.</span></span></span>

<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Tính AC, AD, DC ?</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Chứng minh <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.gif" style="width:45px; height:19px" /></span></span>&nbsp;đồng dạng với <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image014.gif" style="width:45px; height:17px" /></span></span>&nbsp;từ đó suy ra AB.AH = AC.BH</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Tính AH, BH,CH ?</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">...........................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">...........................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">.........................................................................................................................................</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;</span></span><br />
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