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		<h1>Đề thi cuối học kỳ 1 môn Toán lớp 6 - Sách Cánh diều</h1>
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			<li>Thứ ba - 05/12/2023 03:15</li>
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			Đề thi cuối học kỳ 1 môn Toán lớp 6 - Sách Cánh diều, có đáp án kèm theo nhằm giúp các em ôn tập để chuẩn bị tốt cho kỳ thi cuối học kỳ 1. Chúc các em học tốt.
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			<div style="text-align: justify;"><b><i>I.Trắc nghiệm<br />
Chọn phương án trả lời đúng nhất rồi điền vào bảng:</i></b><br />
<b><u>Câu 1</u></b><b>:</b> &nbsp;Trong các số sau số nào là số nguyên tố?<br />
A. 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;<br />
B. 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
C. 6&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;<br />
D. 8<br />
<br />
<b><u>Câu 2</u></b><b>:</b> &nbsp;Phép nhân 2.2.2.2.2.2 được viết thành<br />
A. 2<br />
B. 2<sup>6</sup><br />
C. 6<sup>2</sup><br />
D.&nbsp; 2<sup>3</sup><br />
<br />
<b><u>Câu 3</u></b><b>:</b> &nbsp;Kết quả đúng của phép tính: 2<sup>10</sup> : 2<sup>5</sup> là&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;<br />
A. 1<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. 2<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
C. 2<sup>5</sup>&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;<br />
D. 1<sup>5&nbsp;&nbsp; </sup><br />
<br />
<b><u>Câu 4</u></b><b>:</b> &nbsp;Thứ tự thực hiện phép tính với các biểu thức không có dấu ngoặc là<br />
A. Cộng và trừ -&gt; Nhân và chia&nbsp;<br />
B. Cộng và trừ -&gt; Nhân và chia -&gt; Luỹ thừa&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
C. Nhân và chia -&gt; Luỹ thừa -&gt; Cộng và trừ&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. Luỹ thừa -&gt; Nhân và chia -&gt; Cộng và trừ<br />
<br />
<b><u>Câu 5</u></b><b>:</b> &nbsp;Đâu là một tính chất của phép cộng số tự nhiên?<br />
A. Giao hoán&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. Giao ban&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
C. Giao hảo&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. Giao lưu&nbsp;<br />
<br />
<b><u>Câu 6</u></b>: &nbsp;Số nào sau đây là hợp số?<br />
A. 11&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. 13&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<br />
C. 15&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. 17<br />
<br />
<b><u>Câu 7</u></b><b>:</b> <b>&nbsp;</b>Số có chữ số tận cùng là các số chẵn thì chia hết cho<br />
A. 2&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. 4 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;<br />
C. 6&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. 8<br />
<br />
<b><u>Câu 8</u></b><b>:</b> &nbsp;Các số nguyên sắp xếp theo thứ tự tăng dần là<br />
A. 2; –17; 5; 1; –2; 0&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;<br />
B. –2; –17; 0; 1; 2; 5<br />
C. 0; 1; –2; 2; 5; –17&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;<br />
D. –17; –2; 0; 1; 2; 5<br />
<br />
<b><u>Câu 9</u></b><b>:</b> &nbsp;Kết quả đúng của phép tính: (–12) + 9 là<br />
A. 3<br />
B. –3&nbsp;<br />
C. 21<br />
D. –21<br />
<br />
<b><u>Câu 10</u></b><b>:</b> &nbsp;Số có chữ số tận cùng bằng 0 hoặc 5 thì chia hết cho<br />
A. 5&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. 9 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<br />
C. 3&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. 2<br />
<br />
<b><u>Câu 11</u></b><b>:</b> &nbsp;Khẳng định nào sau đây là <b>sai?</b><br />
A. – 3 là số nguyên âm<br />
B.&nbsp;Số đối của – 4 là 4 &nbsp;&nbsp;&nbsp;&nbsp;<br />
C.&nbsp; Số tự nhiên đầu tiên là số nguyên dương<br />
D. Tập hợp các số nguyên ký hiệu là Z<br />
<br />
<b><u>Câu 12</u></b><b>:</b> &nbsp;Khi bỏ dấu ngoặc trong biểu thức: 2009 -(5 - 9 + 2008)&nbsp; ta được<br />
A.<b> </b>2009 + 5 - 9 - 2008&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<br />
B. 2009 - 5 - 9 + 2008<br />
C.<b>&nbsp;</b>2009 - 5 + 9 + 2008&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br />
D. 2009 - 5 + 9 - 2008<br />
<br />
<b><u>Câu 13</u></b><b>:</b> &nbsp;Câu khẳng định nào sau đây là đúng?<br />
A. Số 0 là số nguyên dương<br />
B. Số 0 không phải là số nguyên dương<br />
C. Số 0 là số nguyên âm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. Số nguyên nhỏ nhất là số 0<br />
<br />
<b><u>Câu 14</u></b><b>:</b> &nbsp;Kết quả đúng của phép tính: 15 . (–4) là<br />
A. 60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;<br />
B. –60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<br />
C. 100&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. –100<br />
<br />
<strong>​Câu 15: &nbsp;Cho hình 1. Công thức tính diện tích của hình chữ nhật là</strong><br />
<img alt="hinh 1" height="148" src="https://sachgiai.com/uploads/news/2023_12/hinh-1.jpg" width="154" /><br />
A. S = 4a&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;<br />
B. S = &nbsp;(a + b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
C. S = &nbsp;<img alt="" height="39" src="https://sachgiai.com/uploads/news/2023_12/image-20231205153035-1.png" width="10" />&nbsp;ab&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;<br />
D. S = a.b​<br />
<br />
<b><u>Câu 16</u></b><b>:</b> &nbsp;Trong hình bình hành, nhận xét nào sau đây là <b>sai</b>?<br />
A. Các cạnh đối bằng nhau&nbsp;&nbsp; &nbsp; &nbsp;<br />
B. Các góc đối bằng nhau<br />
C. Hai đường chéo vuông góc&nbsp;&nbsp; &nbsp; &nbsp;<br />
D. Các cạnh đối song song &nbsp;với nhau<br />
<br />
<b><u>Câu 17</u></b><b>:</b> &nbsp;Trong hình 2, có bao nhiêu hình thang cân?<br />
<img alt="hinh 2" height="143" src="https://sachgiai.com/uploads/news/2023_12/hinh-2.jpg" width="121" /><br />
A. 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
C. 5&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;<br />
D. 6&nbsp;<br />
<br />
<b><u>Câu 18</u></b><b>:</b> &nbsp;Trong hình tam giác điều <b>không có</b> tính chất nào sau đây?<br />
A. Có một góc bằng 60<sup>0</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B. Có một góc bằng 90<sup>0</sup><br />
C. Có ba cạnh bằng nhau &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. Có ba góc bằng nhau<br />
<br />
<b><u>Câu 19</u></b><b>:</b> &nbsp;Những chữ&nbsp; cái nào dưới đây có trục đối xứng?<br />
<img alt="hinh 3" height="74" src="https://sachgiai.com/uploads/news/2023_12/hinh-3.jpg" width="280" /><br />
A.<b> </b>M, P&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
B.<b> </b>M, Q&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;<br />
C.<b> </b>M, E&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D.<b> </b>P, Q<br />
<br />
<b><u>Câu 20</u></b><b>:</b> &nbsp;Trong các hình sau, hình nào có tâm đối xứng?<br />
A. Hình tam giác điều&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;<br />
B. Hình ngũ giác&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<br />
C. Hình thang&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
D. Hình thoi<br />
<br />
<b>II.&nbsp; <u>TỰ LUẬN</u> : </b><i>(5 điểm)</i><br />
<b><u>Bài 1</u></b><b>: </b><i>(1,5 điểm)</i>&nbsp; Thực hiện các phép tính sau:&nbsp;<br />
a.&nbsp;(–15) + (–24);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
b. 5 . (–12);&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;<br />
c. 5 . 4<sup>2</sup> – 18 : 3<sup>2</sup>.&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;<br />
<br />
<b><u>Bài 2</u></b><b>: </b><i>(1,0 điểm)</i>&nbsp; Tìm x, biết:<br />
a.&nbsp;x – 74 = 118;<br />
b. 2x = –20 + 10.<br />
<br />
<b><u>Bài 3</u></b><b>:</b>&nbsp;<i>(1,0 điểm)</i> Học sinh lớp 6B xếp thành 4; 5; 8 đều vừa đủ hàng. Hỏi số học sinh lớp 6B là bao nhiêu? Biết rằng số học sinh nhỏ hơn 45.<br />
<b><u>Bài 4</u></b><b>: </b><i>(1,0 điểm)</i><b>&nbsp;</b>Tính chu vi và diện tích của một hình thoi có cạnh 5cm , độ dài hai đường chéo là 6cm và 8cm.&nbsp;<br />
<b><u>Bài 5</u></b><b>:</b> <i>(0,5 điểm)</i> <b>&nbsp;</b>Chứng tỏ n(n + 3)​​​​​​<i><span style="font-size:13.0pt"><span style="font-family:&#039;Cambria Math&#039;,serif">⋮</span></span></i><img alt="" height="20" src="https://sachgiai.com/uploads/news/2023_12/image-20231205153627-2.png" width="5" />&nbsp;2, với mọi n <img alt="" height="20" src="https://sachgiai.com/uploads/news/2023_12/image-20231205153648-3.png" width="9" />&nbsp;N.
<h2 style="text-align: center;"><strong>ĐÁP ÁN</strong></h2>

<h2><strong>I. Trắc nghiệm</strong></h2>

<table border="1" cellpadding="1" cellspacing="1" style="width:100%;">
	<tbody>
		<tr>
			<td style="text-align: center;"><strong>CÂU</strong></td>
			<td style="text-align: center;"><strong>1</strong></td>
			<td style="text-align: center;"><strong>2</strong></td>
			<td style="text-align: center;"><strong>3</strong></td>
			<td style="text-align: center;"><strong>4</strong></td>
			<td style="text-align: center;"><strong>5</strong></td>
			<td style="text-align: center;"><strong>6</strong></td>
			<td style="text-align: center;"><strong>7</strong></td>
			<td style="text-align: center;"><strong>8</strong></td>
			<td style="text-align: center;"><strong>9</strong></td>
			<td style="text-align: center;"><strong>10</strong></td>
		</tr>
		<tr>
			<td style="text-align: center;"><strong>ĐÁP ÁN</strong></td>
			<td style="text-align: center;">A</td>
			<td style="text-align: center;">B</td>
			<td style="text-align: center;">C</td>
			<td style="text-align: center;">D</td>
			<td style="text-align: center;">A</td>
			<td style="text-align: center;">C</td>
			<td style="text-align: center;">A</td>
			<td style="text-align: center;">D</td>
			<td style="text-align: center;">B</td>
			<td style="text-align: center;">A</td>
		</tr>
		<tr>
			<td style="text-align: center;"><strong>CÂU</strong></td>
			<td style="text-align: center;"><strong>11</strong></td>
			<td style="text-align: center;"><strong>12</strong></td>
			<td style="text-align: center;"><strong>13</strong></td>
			<td style="text-align: center;"><strong>14</strong></td>
			<td style="text-align: center;"><strong>15</strong></td>
			<td style="text-align: center;"><strong>16</strong></td>
			<td style="text-align: center;"><strong>17</strong></td>
			<td style="text-align: center;"><strong>18</strong></td>
			<td style="text-align: center;"><strong>19</strong></td>
			<td style="text-align: center;"><strong>20</strong></td>
		</tr>
		<tr>
			<td style="text-align: center;"><strong>ĐÁP ÁN</strong></td>
			<td style="text-align: center;">C</td>
			<td style="text-align: center;">D</td>
			<td style="text-align: center;">B</td>
			<td style="text-align: center;">B</td>
			<td style="text-align: center;">D</td>
			<td style="text-align: center;">C</td>
			<td style="text-align: center;">A</td>
			<td style="text-align: center;">B</td>
			<td style="text-align: center;">C</td>
			<td style="text-align: center;">D</td>
		</tr>
	</tbody>
</table>
&nbsp;

<h2><strong>II. Tự luận</strong>​</h2>

<table border="1" style="width:100%;" width="705">
	<tbody>
		<tr>
			<td rowspan="8" valign="top">&nbsp;</td>
			<td rowspan="3" style="text-align: center;"><b>&nbsp; 1</b></td>
			<td>a) (–15) + (–24) = – (15 + 24) = –39. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
			<td style="text-align: center;">0,5</td>
		</tr>
		<tr>
			<td>b) 5 . (–12) = – (5 . 12) = –60.&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;</td>
			<td style="text-align: center;">0,5</td>
		</tr>
		<tr>
			<td>c) 5 . 4<sup>2</sup> – 18 : 3<sup>2 </sup>= &nbsp;5 . 16 – 18 : 9 = 80 – 2 = 78.</td>
			<td style="text-align: center;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,5</td>
		</tr>
		<tr>
			<td rowspan="2"><b>2</b></td>
			<td>a) x – 74 = 118<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x = 118 + 74<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x = 192.</td>
			<td style="text-align: center;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25</td>
		</tr>
		<tr>
			<td>b) 2x = –20 + 10<br />
			&nbsp;&nbsp;&nbsp; 2x = –10<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x = –10 : 2<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x = –5.</td>
			<td style="text-align: center;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25</td>
		</tr>
		<tr>
			<td><b>3</b></td>
			<td>Gọi số học sinh lớp 6B là x (x <img alt="" id="_x0000_i1025" o:ole="" src="https://sachgiai.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image001.wmz" style="width:9.75pt; height:9.75pt" /> &nbsp;N*).<br />
			Theo đề bài, ta có x <img alt="" id="_x0000_i1026" o:ole="" src="https://sachgiai.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image001.wmz" style="width:9.75pt; height:9.75pt" /> &nbsp;BC(4, 5, 8) và x &lt; 45.<br />
			Có:<br />
			4 = 2<sup>2 </sup>;&nbsp; 5 = 5 ;&nbsp; 8 = 2<sup>3 </sup><br />
			BCNN(4, 5, 8) = 2<sup>3</sup>. 5 = 40<br />
			=&gt; BC(4, 5, 8) = B(40) = {0; 40; 80; …}.<br />
			Vì x &lt; 45 nên x = 40.<br />
			Vậy: lớp 6B có 40 học sinh.</td>
			<td style="text-align: center;">&nbsp;&nbsp;&nbsp;<br />
			&nbsp;&nbsp;&nbsp;&nbsp; 0,25<br />
			<br />
			<br />
			0,25<br />
			0,25<br />
			<br />
			0,25</td>
		</tr>
		<tr>
			<td><b>4</b></td>
			<td valign="top">&nbsp;Chu vi hình thoi là:<br />
			&nbsp;<img alt="" height="39" src="https://sachgiai.com/uploads/news/2023_12/image-20231205153035-1.png" width="10" />&nbsp;. 6 . 8 = 24 (cm). &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
			Diện tích hình thoi là:<br />
			&nbsp;6. 8 = 48 (cm<sup>2</sup>).</td>
			<td style="text-align: center;">&nbsp;&nbsp;&nbsp;<br />
			&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;0,5<br />
			<br />
			&nbsp;&nbsp;&nbsp;&nbsp; 0,5</td>
		</tr>
		<tr>
			<td><b>5</b></td>
			<td valign="top"><sup>&nbsp;&nbsp;</sup>Ta có:&nbsp; n(n + 3) = n(n + 1 + 2) = n(n + 1) + 2n<br />
			&nbsp; Vì n và n + 1 là hai số tự nhiên liên tiếp nên phải c</td>
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