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		<h1>BÀI TẬP ÔN TẬP MÔN TOÁN 7</h1>
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			<div style="text-align: center;"><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><u>BÀI TẬP ÔN TẬP MÔN TOÁN 7</u></b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 1</b>:Tính bằng cách thuận tiện nhất:</span></span></span></div>
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Mẫu:&nbsp;&nbsp; <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_image002.png" style="width:512px; height:48px" /></span></span></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><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_image004.png" style="width:13px; height:20px" /><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.png" style="width:13px; height:20px" /></span></span><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_image006.png" style="width:153px; height:48px" /></span></span><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_image004.png" style="width:13px; height:20px" /><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.png" style="width:13px; height:20px" /></span></span><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_image008.png" style="width:152px; height:48px" /></span></span><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_image004.png" style="width:13px; height:20px" /></span></span></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><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_image010.png" style="width:131px; height:48px" /></span></span><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_image004.png" style="width:13px; height:20px" /></span></span><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_image012.png" style="width:153px; height:48px" /></span></span></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 2</b>: Tìm x biết:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:6.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image014.png" style="width:252px; height:28px" /></span></span></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:6.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image016.png" style="width:392px; height:24px" /></span></span><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_image004.png" style="width:13px; height:20px" /></span></span></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:31.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image018.png" style="width:216px; height:92px" /></span></span><span style="position:relative"><span style="top:16.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image020.png" style="width:215px; height:56px" /></span></span></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 3:</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;Cho tam giác ABC, góc A = <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_image022.png" style="width:29px; height:24px" /></span></span>. Biết AB+AC=49cm, AB-AC=7cm.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Tính cạnh BC.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 4: </b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho tam giác cân ABC, AB=AC=7cm. Kẻ BD vuông góc với AC. Tính cạnh đáy BC, biết BD = 15cm.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 5:</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho tam giác ABC biết AB=10cm, BC=17cm. Vẽ BD vuông góc với AC tại D và BD =8cm. Tính độ dài cạnh AC</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 6: </b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Đo chiều cao thực tế của 50 em học sinh lứa tuổi từ 14- 15 tuổi ta được số liệu cho trong bảng sau:</span></span></span>

<table class="MsoTableGrid" style="width:661px; border-collapse:collapse; border:none" width="661">
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		<tr>
			<td style="border-bottom:1px solid black; width:79px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">Giá trị (x)</span></span></span></td>
			<td style="border-bottom:1px solid black; width:60px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">138</span></span></span></td>
			<td style="border-bottom:1px solid black; width:52px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">140</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">142</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">144</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">146</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">148</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">150</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">152</span></span></span></td>
			<td style="border-bottom:1px solid black; width:87px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top">&nbsp;</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:79px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">Tần số (n)</span></span></span></td>
			<td style="border-bottom:1px solid black; width:60px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">11</span></span></span></td>
			<td style="border-bottom:1px solid black; width:52px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">6</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">9</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">7</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">5</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">5</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">4</span></span></span></td>
			<td style="border-bottom:1px solid black; width:64px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">3</span></span></span></td>
			<td style="border-bottom:1px solid black; width:87px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">N=50</span></span></span></td>
		</tr>
	</tbody>
</table>
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">( đơn vị : cm, thực hiện đo năm 2002)</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">a, Hãy tính số trung bình cộng các giá trị của dấu hiệu trên. Tìm mốt của bảng trên.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">b, Giả sử năm 1986 chiều cao trung bình của các em học sinh lưá tuổi 14-15 là 137cm. Vậy so với năm 1986 chiều cao trung bình của các em lứa tuổi 14-15 tuổi đã cao hơn bao nhiêu cm?</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 7 :</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Một của hàng bán áo sơ mi cho nam giới trong 1 tháng có các cỡ sau:</span></span></span>

<table class="MsoTableGrid" style="border-collapse:collapse; border:none">
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">Cỡ áo (x)</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">36</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">37</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">38</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">39</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">40</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">41</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">42</span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">Số áo bán (n)</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">10</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">30</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">50</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">80</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">40</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">10</span></span></span></td>
			<td style="border-bottom:1px solid black; width:80px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:14pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif">5</span></span></span></td>
		</tr>
	</tbody>
</table>
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Hãy cho biết :</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">1, Dấu hiệu cần tìm hiểu là gì?</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">2. Số tất cả giá trị của dấu hiệu là bao nhiêu?</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">3. Số các giá trị khác nhau là bao nhiêu?</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">4. Dựng biểu đồ đoạn thẳng.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">5. Tìm mốt.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>BÀI 8</b> : Tìm giá trị nhỏ nhất của các biểu thức sau:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:31.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image024.png" style="width:270px; height:103px" /></span></span><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_image004.png" style="width:13px; height:20px" /></span></span></span></span></span><br />
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				Giáo viên: Lê Cẩm Nhung
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