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      <title>Luyện tập chung by Minh Bình Tạ</title>
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      <description>Dành cho học sinh lớp 6.</description>
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      <pubDate>2021-11-28 14:12:14 UTC</pubDate>
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         <title>Bài tập 3.29</title>
         <author>minhbinhrg83</author>
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         <pubDate>2021-12-08 06:47:11 UTC</pubDate>
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         <title>Vương Mỹ Tâm</title>
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         <pubDate>2021-12-08 06:48:27 UTC</pubDate>
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      <item>
         <title>Lê Nguyễn Thanh sơn </title>
         <author></author>
         <link>https://padlet.com/minhbinhrg83/zrtjt72cxx97gqc/wish/1935244381</link>
         <description><![CDATA[<div>Tính một cách hợp lí:<br><br>a) 2 834 + 275&nbsp; - 2 833 - 265;<br><br>= (2 834 – 2 833) + (275 – 265)<br><br>= 1 + 10<br><br>= 11<br><br>b) (11 + 12 + 13) - (1 + 2 + 3).<br><br>= (11 – 1) + (12 – 2) + (13 – 3)<br><br>= 10 + 10 + 10<br><br>= 30</div>]]></description>
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         <pubDate>2021-12-08 06:49:04 UTC</pubDate>
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      <item>
         <title>Trần Đỗ THÚY VY</title>
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         <pubDate>2021-12-08 06:50:04 UTC</pubDate>
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      <item>
         <title> Kim Lý Thủy Tiên </title>
         <author></author>
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         <pubDate>2021-12-08 06:50:06 UTC</pubDate>
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         <title>Trần Tường Sang </title>
         <author></author>
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         <pubDate>2021-12-08 06:50:59 UTC</pubDate>
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         <title></title>
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         <description><![CDATA[<div>Bùi Văn Hiệp</div>]]></description>
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         <pubDate>2021-12-08 06:51:51 UTC</pubDate>
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      <item>
         <title>Phạm Minh Trí</title>
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         <description><![CDATA[<div>a) 2 834 + 275 - 2 833 - 265&nbsp;<br><br></div><div>= (2 834 - 2 833) + (275 - 265)&nbsp;<br><br></div><div>= 1 + 10&nbsp;<br><br></div><div>= 11<br><br></div><div>b) (11 + 12 + 13) - (1 + 2 + 3)&nbsp;<br><br></div><div>= 11 + 12 + 13 - 1 - 2 - 3&nbsp;<br><br></div><div>= (11 - 1) + (12 - 2) + (13 - 3)&nbsp;<br><br></div><div>= 10 + 10 + 10&nbsp;<br><br></div><div>= 20 + 10<br><br></div><div>= 30</div>]]></description>
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         <pubDate>2021-12-08 06:52:13 UTC</pubDate>
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         <title>Trần Tường Sang bài 2.29 a)</title>
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         <pubDate>2021-12-08 06:53:13 UTC</pubDate>
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         <title>Trần Tường Sang bài 2.29 b)</title>
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         <pubDate>2021-12-08 06:53:50 UTC</pubDate>
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         <title></title>
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         <pubDate>2021-12-08 06:54:18 UTC</pubDate>
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         <title>Bùi Văn Hiệp</title>
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         <pubDate>2021-12-08 06:54:40 UTC</pubDate>
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         <title></title>
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         <description><![CDATA[<div>a) 2834+275-2833-265<br>&nbsp; &nbsp;=(2834-2833)+(275-265)<br>&nbsp; &nbsp;=1+10<br>&nbsp; &nbsp;=11<br><br>b)(11+12+13)-(1+2+3)<br>&nbsp; &nbsp;=11+12+13-1-2-3<br>&nbsp; &nbsp;=(11-1)+(12-2)+(13-3)<br>&nbsp; &nbsp;=10+10+10<br>   =30</div>]]></description>
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         <pubDate>2021-12-08 06:54:56 UTC</pubDate>
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         <title>3.29  a) 2834+275-2833-265=(2834-2833)+(275-265)=1+10=11   b) (11+12+13)-(1+2+3)=11+12+13-1-2-3=(11-1)+(12-2)+(13-3)+10+10+10=20+10=30</title>
         <author></author>
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         <description><![CDATA[<div>Lê Thị Kiều Giang</div>]]></description>
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         <pubDate>2021-12-08 06:55:56 UTC</pubDate>
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      <item>
         <title>Đặng hoàng kha</title>
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         <pubDate>2021-12-08 06:57:14 UTC</pubDate>
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         <title>Trần Gia Huy</title>
         <author></author>
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         <pubDate>2021-12-08 06:58:19 UTC</pubDate>
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      <item>
         <title> Thủy Tiên Lý Kim</title>
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         <pubDate>2021-12-08 07:11:53 UTC</pubDate>
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         <title>Vương Mỹ Tâm</title>
         <author></author>
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         <pubDate>2021-12-08 07:12:13 UTC</pubDate>
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         <title>Kim Lý Thủy Tiên </title>
         <author></author>
         <link>https://padlet.com/minhbinhrg83/zrtjt72cxx97gqc/wish/1935274239</link>
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         <pubDate>2021-12-08 07:13:34 UTC</pubDate>
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      <item>
         <title>Trần Gia Huy</title>
         <author></author>
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         <pubDate>2021-12-08 07:13:53 UTC</pubDate>
         <guid>https://padlet.com/minhbinhrg83/zrtjt72cxx97gqc/wish/1935274576</guid>
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      <item>
         <title> Kim Lý thủy tiên</title>
         <author></author>
         <link>https://padlet.com/minhbinhrg83/zrtjt72cxx97gqc/wish/1935275276</link>
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         <pubDate>2021-12-08 07:14:28 UTC</pubDate>
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         <title>Trần Đỗ Thúy Vy</title>
         <author></author>
         <link>https://padlet.com/minhbinhrg83/zrtjt72cxx97gqc/wish/1935276601</link>
         <description><![CDATA[<div>a) S= { x € Z | -3 &lt; x ≤ 3}<br>Giải<br>Ta có : x € {-1;-2;0;1;2;3}<br>Tổng các phần tử của S là :<br>-2+(-1)+0+1+2+3 = [(-2)+2] +[(-1)+1]+0+3<br>=0 + 0 +0 +3<br>=3<br><br>b)T = {X € Z | -7 &lt; x≤-2}<br>Giải<br>Ta có : X € {-6;-5;-4;-3-2}<br>Tổng các phần tử của T là :<br>(-6)+(-5)+(-4)+(-3)+(-2) = [6+5+4+2]<br>= [( 6+4)] + [(5+3+2)]<br>= -10 + (-10)<br>= -20<br><br></div>]]></description>
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         <pubDate>2021-12-08 07:15:35 UTC</pubDate>
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         <title>Trần Gia Huy</title>
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         <pubDate>2021-12-08 07:23:02 UTC</pubDate>
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         <title>Trần Gia Huy </title>
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