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      <title>6A_BÀI 14:PHÉP CỘNG VÀ TRỪ SỐ NGUYÊN( TIẾT 3) by Thầy Khoa Phương</title>
      <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61</link>
      <description>6A_DỰ GIỜ SÁNG 18/12/21</description>
      <language>en-us</language>
      <pubDate>2021-12-17 14:20:29 UTC</pubDate>
      <lastBuildDate>2025-12-09 18:14:23 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
      <image>
         <url>https://padlet.net/icons/png/1f50f.png</url>
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      <item>
         <title></title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953784652</link>
         <description><![CDATA[<div><strong>Tính và so sánh giá trị của (a+b)+c&nbsp;<br>và a+(b+c)</strong></div><div><strong>với a=2, b=-4, c=-6<br>Gợi ý:<br>Ta có: [2+(-4)]+(-6)=</strong></div><div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2+[(-4)+(-6)]=</strong></div>]]></description>
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         <pubDate>2021-12-17 14:24:49 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953784652</guid>
      </item>
      <item>
         <title>Luyện tập 4 trang 65 </title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953790437</link>
         <description><![CDATA[<div><strong>Tính một cách hợp lí:<br></strong><br></div><div><strong>a) (-2019) + (-550) + (-451)<br></strong><br></div><div><strong>b) (-2) + 5 + (-6) + 9</strong><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-17 14:28:08 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953790437</guid>
      </item>
      <item>
         <title>Bài 3.16 trang 66 </title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953797552</link>
         <description><![CDATA[<div><strong>Tính một cách hợp lí:<br></strong><br></div><div><strong>b) 7 + 8 + (-9) + (-10).</strong><br><br></div>]]></description>
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         <pubDate>2021-12-17 14:31:56 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953797552</guid>
      </item>
      <item>
         <title>Luyện tập 5 trang 66 </title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953797940</link>
         <description><![CDATA[<div><strong>Tính các hiệu sau:<br></strong><br></div><div><strong>a) 5 – (-3)<br></strong><br></div><div><strong>b) (-7) - 8.</strong><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-17 14:32:10 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953797940</guid>
      </item>
      <item>
         <title></title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953798272</link>
         <description><![CDATA[<div><strong>BÀI TẬP 3.12</strong></div><div><strong>Thực hiện phép tính sau</strong></div><div><strong>a)9 – (-2)</strong></div><div><br></div><div><strong>d)(-63) – (-15)</strong></div>]]></description>
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         <pubDate>2021-12-17 14:32:22 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953798272</guid>
      </item>
      <item>
         <title>VẬN DỤNG 3</title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953798525</link>
         <description><![CDATA[<div><strong>Nhiệt độ bên ngoài của một máy bay ở độ cao 10 000 m là – 48</strong><strong><sup>o</sup></strong><strong>C. Khi hạ cánh, nhiệt độ ở sân bay là 27</strong><strong><sup>o</sup></strong><strong>C. Hỏi nhiệt độ bên ngoài của máy bay khi ở độ cao 10 000 m và khi hạ cánh chênh lệch bao nhiêu độ C?<br></strong><strong><mark>Gợi ý lời giải:<br></mark></strong><mark>Nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau:</mark><strong><br></strong><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-17 14:32:32 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953798525</guid>
      </item>
      <item>
         <title>BÀI TẬP 3.15 T66</title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953798776</link>
         <description><![CDATA[<div><strong>Tính nhẩm</strong></div><div><strong>b)(-8) – 7 =</strong></div><div><br></div><div><strong>d) 12– (-8) =</strong></div>]]></description>
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         <pubDate>2021-12-17 14:32:42 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953798776</guid>
      </item>
      <item>
         <title></title>
         <author>khoavnkg</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953890967</link>
         <description><![CDATA[<div>Một tòa nhà có tám tầng được đánh số theo thứ tự 0 (tầng mặt đất), 1, 2, 3, ..., 7 và hai tầng hầm được đánh số -1, - 2. Em hãy dùng phép cộng các số nguyên để diễn tả tình huống sau:<br><strong>Một thang máy đang ở tầng – 2, nó đi lên 5 tầng. Hỏi thang máy dừng lại ở tầng mấy?(Ở một số tòa nhà, tầng mặt đất còn được gọi là tầng G).</strong></div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1298593024/458878458bd4cb38042f53863d78b390/nha8tang.jpg" />
         <pubDate>2021-12-17 15:25:18 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1953890967</guid>
      </item>
      <item>
         <title>Bảo Trân</title>
         <author>nguyenhoangbaotran0404</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954391044</link>
         <description><![CDATA[<div>&nbsp; [2+(-4)]+(-6)<br>=[-2+(-6)<br>=-8<br>&nbsp; &nbsp;2+[(-4)+(-6)]<br>=2+(-10)<br>=-8<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:11:44 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954391044</guid>
      </item>
      <item>
         <title>Tiên</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954392672</link>
         <description><![CDATA[<div>a.(-2019)+(-550)+(-451)<br>=3020<br>b.(-2)+5+(-6)+9<br>=6 <br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:15:21 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954392672</guid>
      </item>
      <item>
         <title>Như Quỳnh</title>
         <author>nguyenthinhuquynh2514</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954393160</link>
         <description><![CDATA[<div>= - (4 - 2) + (-6)</div><div>= - 2 + (-6)<br>= - (2 + 6)<br>= - 8<br><br>= 2 + [-(4 +6)]&nbsp;</div><div>= 2 + (-10)</div><div>= - (10 - 2)<br>= - 8<br>Vậy (a + b) + c = a + (b + c).</div><div><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:16:22 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954393160</guid>
      </item>
      <item>
         <title>Thành Đạt</title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954393512</link>
         <description><![CDATA[<div>&nbsp; [2+(-4)]+(-6)&nbsp;<br>= -2 + (-6)<br>= -(2 + 6)<br>= -8<br>&nbsp; 2 + [(-4) + (-6)]<br>= 2+ (-10)<br>= -(10 - 2)<br>= -8<br>&nbsp;Vì -8 = -8 nên (a + b) + c = a + (b + c)</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:17:07 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954393512</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenhoangbaotran0404</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954394860</link>
         <description><![CDATA[<div>a) (-2019) + (-550) + (-451) = [(-2019) + (-451)] + (-550) (tính chất giao hoán và kết hợp)<br>&nbsp;= - (2019 + 451) + (-550)<br>&nbsp;= (- 2470) + (- 550)<br>&nbsp;= - (2 470 + 550).<br>&nbsp;= - 3020.<br>b) (-2) + 5 + (-6) + 9&nbsp;<br>= [(-2) + (-6)] + (5 + 9)&nbsp; &nbsp;<br>= - (2 + 6) +14 = (-8) + 14 = 14 – 8 = 6 (do 14 &gt; 8).<br><br></div><div><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:19:49 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954394860</guid>
      </item>
      <item>
         <title>Băng </title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954394938</link>
         <description><![CDATA[<div>a) (-2019)+(-550)+(-451)=-3020<br>b)(-2)+5+(-6)+9=6</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:20:02 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954394938</guid>
      </item>
      <item>
         <title>Trúc Mai</title>
         <author>nguyenphamtrucmai2010</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954395631</link>
         <description><![CDATA[<div>&nbsp; [2+(-4)]+(-6)<br>=-2+[-(4+6)]<br>=-8<br><br>&nbsp; &nbsp;2=[(-4)=(-6)]<br>=2+[(-4)+(-6)]<br>=-8<br>&nbsp;Vì -8=-8 nên (a+b) +c=a+(b+c)</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:21:29 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954395631</guid>
      </item>
      <item>
         <title>Như Quỳnh</title>
         <author>nguyenthinhuquynh2514</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954396417</link>
         <description><![CDATA[<div>A) (-2 019) + (-550) + (-451) = [(-2 019) + (-451)] + (-550)&nbsp;<br>= - (2 019 + 451) + (-550)<br>= (- 2 470) + (- 550)<br>= - (2 470 + 550)</div><div>= - 3 020.<br>b) (-2) + 5 + (-6) + 9&nbsp;</div><div>= [(-2) + (-6)] + (5 + 9)<br>= - (2 + 6) +14 = (-8) + 14 = 14 – 8 = 6(do 14&gt;8).</div><div><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:23:02 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954396417</guid>
      </item>
      <item>
         <title>Thu Thảo</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954396591</link>
         <description><![CDATA[<div>= - (4 - 2) + (-6)<br>= - 2 + (-6)<br>= - (2 + 6)<br>= - 8<br><br>= 2 + [-(4 +6)]&nbsp;<br>= 2 + (-10)<br>= - (10 - 2)<br>= - 8<br>Vậy (a + b) + c = a + (b + c).<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:23:23 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954396591</guid>
      </item>
      <item>
         <title>Tiên</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954396838</link>
         <description><![CDATA[<div>a.<br>=-(2019+451)+(-550)<br>=(-2470)+(-550)<br>=-(2470)+550)<br>=-3020<br>b.<br>=[(-2)+(-6)]+(5+9)<br>=-(2+6)+14=(-8)+14=14-8=6 (do 14&gt;8)</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:23:53 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954396838</guid>
      </item>
      <item>
         <title>Thúy an</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397119</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1452535513/6a0e8203e43fa00cf349346e4a14eee2/1639787042184840437550774832042.jpg" />
         <pubDate>2021-12-18 00:24:23 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397119</guid>
      </item>
      <item>
         <title>Thu Thảo </title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397288</link>
         <description><![CDATA[<div>(-2019) + (-550) + (-451) = [(-2019) + (-451)] + (-550) (tính chất giao hoán và kết hợp)<br>&nbsp;= - (2019 + 451) + (-550)<br>&nbsp;= (- 2470) + (- 550)<br>&nbsp;= - (2 470 + 550).<br>&nbsp;= - 3020.<br>b) (-2) + 5 + (-6) + 9&nbsp;<br>= [(-2) + (-6)] + (5 + 9)&nbsp; &nbsp;<br>= - (2 + 6) +14 = (-8) + 14 = 14 – 8 = 6 (do 14 &gt; 8).</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:24:40 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397288</guid>
      </item>
      <item>
         <title>An Nhi</title>
         <author>annhi2010kgvn</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397810</link>
         <description><![CDATA[<div>a.&nbsp; (-2019)+(-550)+(-451)<br>=[(-2019) + (-451)] + (-550)<br>= -(2019 + 451)+(-550)<br>= (-2470)+(-550)<br>= -[(2 470 + 550)]<br>=&nbsp; &nbsp; &nbsp;3020<br>b.(-2)+5+(-6)+9<br>= [(-2) + (-6)] + (5 + 9)&nbsp; &nbsp;<br>= - (2 + 6) +14&nbsp;<br>= (-8) + 14&nbsp;<br>= 14 – 8&nbsp;<br>= 6<br>=&gt; do 14 &gt; 8</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:25:43 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397810</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397905</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1377840351/7e85926b38c46c4e22a9caae85c47630/_n.jpeg" />
         <pubDate>2021-12-18 00:25:58 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397905</guid>
      </item>
      <item>
         <title>Khánh my</title>
         <author>khanhmy9291</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397944</link>
         <description><![CDATA[<div>(-2019) + (-550) + (-451) = [(-2019) + (-451)] + (-550) (tính chất giao hoán và kết hợp)<br>&nbsp;= - (2019 + 451) + (-550)<br>&nbsp;= (- 2470) + (- 550)<br>&nbsp;= - (2 470 + 550).<br>&nbsp;= - 3020.<br>b) (-2) + 5 + (-6) + 9&nbsp;<br>= [(-2) + (-6)] + (5 + 9)&nbsp; &nbsp;<br>= - (2 + 6) +14 = (-8) + 14 = 14 – 8 = 6 (do 14 &gt; 8).</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:26:03 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954397944</guid>
      </item>
      <item>
         <title>Thành Đạt</title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954398064</link>
         <description><![CDATA[<div>a)(-2019) + (-550) + (-451) = [(-2 019) + (-451)] + (-550)<br>= -(2019 + 451) + (-550)</div><div>= (-2470) + (-550)<br>= -(2470 + 550)<br>= -3 020<br><br>b)(-2) + 5 + (-6) + 9&nbsp;<br>= [(-2) + (-6)] + (5 + 9)<br>= -(2 + 6) +14 = (-8) + 14 = 14 – 8&nbsp;<br>= 6</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:26:18 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954398064</guid>
      </item>
      <item>
         <title>Thúy an</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954398455</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1452535513/0c580535a60c5a5fa0f39dca94519120/16397871502008000942643909118318.jpg" />
         <pubDate>2021-12-18 00:27:04 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954398455</guid>
      </item>
      <item>
         <title>khả hân</title>
         <author>vongockhahan102021</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954398622</link>
         <description><![CDATA[<div>a) (-2019) + (-550) + (-451) = [(-2019) &nbsp; + (-451)] + (-550)&nbsp;<br>&nbsp; &nbsp; = - (2 019 + 451) + (-550)<br><br></div><div>&nbsp; &nbsp; = (- 2 470) + (-550 )</div><div><br></div><div>&nbsp; &nbsp; = - (2 470 + 550)<br><br>&nbsp; &nbsp; &nbsp;= - 3 020<br>b) (-2) + 5 + (-6) + 9&nbsp;<br><br></div><div>= [(-2) + (-6)] + (5 + 9)&nbsp; &nbsp;<br>= - (2 + 6) +14 = (-8) + 14 = 14 – 8 = 6 (do 14 &gt; 8).<br><br></div><div><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:27:24 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954398622</guid>
      </item>
      <item>
         <title>Bảo Trân</title>
         <author>nguyenhoangbaotran0404</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954399540</link>
         <description><![CDATA[<div>b) 7 + 8 + (-9) + (-10).&nbsp;<br>= [(7 + (-9)] + [8 + (-10)]<br>= (-(9 – 7)] + [- (10 – 8)]<br>= (-2) + (-2)<br>= - (2 + 2).<br>= - 4.<br><br></div><div><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:29:07 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954399540</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenphamtrucmai2010</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954399556</link>
         <description><![CDATA[<div>a) (-2019)+(-550)+(-451)=[9-2019)]+(-451)]+(550).<br>=-(2019+451)+(550)<br>=(-2470)+(-550)<br>=-(2470+550).<br>=-3020.<br>b) (-2)+5+(-6)+9<br>=-[(-2)+(-6)]+(5+9)<br>=-(2+6)+14=(-8)+14=14-8<br>=6 (do 14&gt;8).&nbsp;</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:29:09 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954399556</guid>
      </item>
      <item>
         <title>An Nhi</title>
         <author>annhi2010kgvn</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954399992</link>
         <description><![CDATA[<div>b)   7 + 8 + ( -9 ) + ( -10 )<br>= [(7 + (-9)] + [8 + (-10)]<br>=   (-(9 – 7)] + [- (10 – 8)]<br>=           (-2) + (-2)<br>=           - (2 + 2).<br>=                 - 4.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:29:55 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954399992</guid>
      </item>
      <item>
         <title>Khả Hân</title>
         <author>vongockhahan102021</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400515</link>
         <description><![CDATA[<div>b) 7 + 8 + (-9) + (-10).&nbsp;</div><div>= [(7 + (-9)] + [8 + (-10)]</div><div>= (- (9 – 7)] + [- (10 – 8)]<br>= (-2) + (-2)</div><div>= - (2 + 2)</div><div>= - 4.<br><br></div><div><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:30:30 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400515</guid>
      </item>
      <item>
         <title>Trần Hữu Khang</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400631</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1417965757/bb9afe1389da75a45417424d4978399a/image.jpg" />
         <pubDate>2021-12-18 00:30:43 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400631</guid>
      </item>
      <item>
         <title></title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400859</link>
         <description><![CDATA[<div>b) 7 + 8 + (-9) + (-10)</div><div>= [(7 + (-9)] + [8 + (-10)]</div><div>= [-(9 – 7)] + [-(10 –8)]</div><div>= (-2) + (-2)</div><div>= -(2 + 2)</div><div>= -4</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:31:09 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400859</guid>
      </item>
      <item>
         <title>Thu Thảo</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400923</link>
         <description><![CDATA[<div>b) 7 + 8 + ( -9 ) + ( -10 )<br>= [(7 + (-9)] + [8 + (-10)]<br>= (-(9 – 7)] + [- (10 – 8)]<br>= (-2) + (-2)<br>= - (2 + 2).<br>= - 4.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:31:15 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954400923</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401052</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1377840351/53852369771ae67eda064de56218c5f1/_n.jpeg" />
         <pubDate>2021-12-18 00:31:30 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401052</guid>
      </item>
      <item>
         <title>Như Quỳnh</title>
         <author>nguyenthinhuquynh2514</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401070</link>
         <description><![CDATA[<div>b) 7+8+(-9)+(-10)<br>=[(7+(-9)]+[8+(-10)]<br>=(-(9-7)]+[-(10-8)]<br>=(-2)+(-2)<br>=-(2+2)<br>=4.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:31:31 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401070</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenphamtrucmai2010</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401331</link>
         <description><![CDATA[<div>b)7+8+(-8)+(-10).<br>=[(7+(-9)]+[8+(-10)]<br>=[-(9-7)]+[-(10-8)]<br>=(-2)+(-2)<br>=-(2+2)<br>=-4</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:32:00 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401331</guid>
      </item>
      <item>
         <title>Thúy an</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401388</link>
         <description><![CDATA[<div>=4</div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1452535513/62327e2f338cff8ad4af2c7d62428a7a/16397874893505814308877866342322.jpg" />
         <pubDate>2021-12-18 00:32:06 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401388</guid>
      </item>
      <item>
         <title>Ngọc hân</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401990</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1377839231/b74b2826e3499ee79f1edc8b678da1ba/16397875444025525663892694522887.jpg" />
         <pubDate>2021-12-18 00:33:12 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954401990</guid>
      </item>
      <item>
         <title>An Nhi</title>
         <author>annhi2010kgvn</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954405011</link>
         <description><![CDATA[<div>a) 5 - ( -3 ) = 5 + 3 = 8<br>b) ( -7 ) - 8 =( -7 ) + ( -8 )  = -( 7 + 8 ) = -15<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:38:32 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954405011</guid>
      </item>
      <item>
         <title>Bảo Trân</title>
         <author>nguyenhoangbaotran0404</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954405116</link>
         <description><![CDATA[<div>a)5 – (-3) = 5 + 3 = 8.<br>b)(-7) – 8 = (- 7) + (- 8) = - (7 + 8) = -15.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:38:41 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954405116</guid>
      </item>
      <item>
         <title>Khả Hân</title>
         <author>vongockhahan102021</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954405452</link>
         <description><![CDATA[<div>a) 5 – (-3); = 5 + 3 = 8.<br><br></div><div>b) (-7) – 8 = (- 7) + (- 8) = - (7 + 8) = -15.<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:39:16 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954405452</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406035</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1377840351/4d6128a7e23bb7a468c3c4242d8d8ed5/_n.jpeg" />
         <pubDate>2021-12-18 00:40:20 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406035</guid>
      </item>
      <item>
         <title>khánh linh</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406157</link>
         <description><![CDATA[<div>a)5-(-3)=5+3=8<br>b)(-7)-8 = (-7)+(-8)=-(7+8)=15</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:40:37 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406157</guid>
      </item>
      <item>
         <title>kiệt  </title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406180</link>
         <description><![CDATA[<div>a) 5-(-3)=5+3=8<br>b) (-7)-8=(-7)+(-8)=-(7+8)=-15</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:40:41 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406180</guid>
      </item>
      <item>
         <title></title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406205</link>
         <description><![CDATA[<div>a) 5 – (-3)&nbsp;= 5 + 3 = 8</div><div>b) (-7) – 8 = (- 7) + (- 8)&nbsp;<br>= -(7 + 8)&nbsp;<br>= -15</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:40:43 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406205</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenphamtrucmai2010</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406264</link>
         <description><![CDATA[<div>a)5-(-3)=5+3+8<br>b)(-7)-8=(-7)+(-8)=-(7+8)=-15</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:40:50 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406264</guid>
      </item>
      <item>
         <title>Thu Thảo</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406705</link>
         <description><![CDATA[<div>5 – (-3) = 5 + 3 = 8.<br>b)(-7) – 8 = (- 7) + (- 8) = - (7 + 8) = -15.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:41:40 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406705</guid>
      </item>
      <item>
         <title>Thúy an</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406725</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1452535513/c0ce100bd6aae430ebd2a830da1d9aed/16397880835047949624536797199483.jpg" />
         <pubDate>2021-12-18 00:41:42 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406725</guid>
      </item>
      <item>
         <title>Băng </title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406999</link>
         <description><![CDATA[<div>a) 5-(-3)=5+3=8<br>b)(-7)-8=(-70+(-8)=-(7+8)=-15</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:42:11 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954406999</guid>
      </item>
      <item>
         <title>Bảo Trân</title>
         <author>nguyenhoangbaotran0404</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954407312</link>
         <description><![CDATA[<div>Nhiệt độ bên ngoài của máy bay ở độ cao 10000m và khi hạ cánh chênh lệch nhau:<br>27 - (- 48) = 27 + 48 = 75 (<sup>o</sup>C).<br>Vậy nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau 75<sup>o</sup>C.<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:42:45 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954407312</guid>
      </item>
      <item>
         <title>Khả Hân</title>
         <author>vongockhahan102021</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954407721</link>
         <description><![CDATA[<div>Nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau:</div><div>27 - (- 48) = 27 + 48 = 75 (<sup>o</sup>C)</div><div>Vậy nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau 75 <sup>o</sup>C.<br><br></div><div><br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:43:28 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954407721</guid>
      </item>
      <item>
         <title>An Nhi</title>
         <author>annhi2010kgvn</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408030</link>
         <description><![CDATA[<div>27 - ( -48 ) = 27 + 48 = 75 ( độ C )</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:44:02 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408030</guid>
      </item>
      <item>
         <title>Nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau:27 - (- 48) = 27 + 48 = 75 (oC)Vậy nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau 75 oC.</title>
         <author></author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408065</link>
         <description><![CDATA[<div>Thúy&nbsp;an</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:44:05 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408065</guid>
      </item>
      <item>
         <title>Như Quỳnh</title>
         <author>nguyenthinhuquynh2514</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408503</link>
         <description><![CDATA[<div>Nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau:</div><div>27 - (- 48) = 27 + 48 = 75 (độ C)</div><div>Như vậy nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau là 75 độ C.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:44:55 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408503</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenhoangbaotran0404</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408630</link>
         <description><![CDATA[<div>b) (-8) – 7&nbsp;<br>= (-8) + (-7)<br>= - (8 + 7)<br>= - 15<br>d) 12 – (-8<br>= 12 + 8<br>= 20.</div><div><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:45:09 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408630</guid>
      </item>
      <item>
         <title>Thành Đạt</title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408754</link>
         <description><![CDATA[<div>Nhiệt độ bên ngoài máy bay ở độ cao 10000m và lúc hạ cánh chênh lệch nhau:</div><div>27 - (-48) = 27 + 48 = 75 (độ C)</div><div>Vậy nhiệt độ bên ngoài máy bay ở độ cao 10000m và lúc hạ cánh chênh lệch nhau là 75 độ C</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:45:23 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954408754</guid>
      </item>
      <item>
         <title>Khả Hân</title>
         <author>vongockhahan102021</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409032</link>
         <description><![CDATA[<div>b) (-8) – 7&nbsp;</div><div>= (-8) + (-7)</div><div>= - (8 + 7)</div><div>= - 15<br>d) 12 – (-8</div><div>= 12 + 8</div><div>= 20.<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:45:55 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409032</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenphamtrucmai2010</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409358</link>
         <description><![CDATA[<div>&nbsp;Nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau:<br>&nbsp; 27-(-48)=27+48=75(độ C)<br>&nbsp;Vậy nhiệt độ bên ngoài của máy bay ở độ cao 10 000m và khi hạ cánh chênh lệch nhau 75 độ C.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:46:28 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409358</guid>
      </item>
      <item>
         <title>Như Quỳnh</title>
         <author>nguyenthinhuquynh2514</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409457</link>
         <description><![CDATA[<div>b) (-8)-7<br>=(-8)+(-7)<br>=-(8+7)<br>=-15.<br>d) 12-(-8)<br>=12+8<br>=20.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:46:37 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409457</guid>
      </item>
      <item>
         <title>Thành Đạt</title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409515</link>
         <description><![CDATA[<div>b) (-8) – 7&nbsp;</div><div>= (-8) + (-7)</div><div>= -(8 + 7)</div><div>= -15<br>d) 12 – (-8</div><div>= 12 + 8</div><div>= 20</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:46:43 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409515</guid>
      </item>
      <item>
         <title>An Nhi</title>
         <author>annhi2010kgvn</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409784</link>
         <description><![CDATA[<div><strong>b) ( -8 ) – 7 = ( - 8 ) + ( -7 ) = - ( 8 + 7 ) = -15</strong></div><div><br></div><div><strong>d) 12– ( -8 ) </strong>= 12 + 8 = 20</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:47:09 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954409784</guid>
      </item>
      <item>
         <title></title>
         <author>nguyenphamtrucmai2010</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954410595</link>
         <description><![CDATA[<div>b) (-8) -7<br>=(-8)+7<br>=-(8+7)<br>=-15<br>d)12-(-8)<br>=12+8<br>=20.</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:48:34 UTC</pubDate>
         <guid>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954410595</guid>
      </item>
      <item>
         <title>Thành Đạt</title>
         <author>thanhdat2202rion</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954410989</link>
         <description><![CDATA[<div>_ Ta có (-2) + 5 = 5 – 2 = 3<br>Thang máy dừng ở tầng 3</div>]]></description>
         <enclosure url="" />
         <pubDate>2021-12-18 00:49:16 UTC</pubDate>
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         <title>Như Quỳnh</title>
         <author>nguyenthinhuquynh2514</author>
         <link>https://padlet.com/khoavnkg/payyjhn89a6nhr61/wish/1954412291</link>
         <description><![CDATA[<div>+) (-2)+5=5-2=3<br>Vậy thang máy dừng ở tầng 3.<br><br></div>]]></description>
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         <pubDate>2021-12-18 00:50:17 UTC</pubDate>
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