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      <title>Bài tập BD HSG 9 NVL 25 26 by nhudai Nguyen</title>
      <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck</link>
      <description></description>
      <language>en-us</language>
      <pubDate>2023-02-01 10:05:23 UTC</pubDate>
      <lastBuildDate>2026-03-23 15:56:50 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>bài 1 so sánh 2 số </title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3628192465</link>
         <description><![CDATA[<p>cái này do lúc làm cháu kh bt lưu file nên chụp màn hình lại, thầy thông cảm ;)</p><p><br/></p>]]></description>
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         <pubDate>2025-10-12 12:44:34 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3628192465</guid>
      </item>
      <item>
         <title>bài 2 xét các số đc nhập là tam giác cân hay vuông hay đều.</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3628193371</link>
         <description><![CDATA[<p>cái này giống bài 1</p><p><br/></p>]]></description>
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         <pubDate>2025-10-12 12:45:38 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3628193371</guid>
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      <item>
         <title>bài 3 tìm nghiệm</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3628194020</link>
         <description><![CDATA[<p>cái này giống bài 1,2</p>]]></description>
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         <pubDate>2025-10-12 12:46:27 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3628194020</guid>
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      <item>
         <title>7</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635293226</link>
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         <pubDate>2025-10-16 06:27:33 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635293226</guid>
      </item>
      <item>
         <title>bai 4 nhap ba so, tinh dien tich</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635332034</link>
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         <pubDate>2025-10-16 06:50:26 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635332034</guid>
      </item>
      <item>
         <title>nhap toa xet cac goc</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635334492</link>
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         <pubDate>2025-10-16 06:51:43 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635334492</guid>
      </item>
      <item>
         <title>tinh khoi luong co the</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635336384</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-10-16 06:52:51 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635336384</guid>
      </item>
      <item>
         <title>bai 7 tien dien (da lam xong)</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635386646</link>
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         <pubDate>2025-10-16 07:24:04 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635386646</guid>
      </item>
      <item>
         <title>BÀI 8 oẳn tù tì</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635430830</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-10-16 07:55:40 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3635430830</guid>
      </item>
      <item>
         <title>Ví dụ câu lệnh lặp</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3638408102</link>
         <description><![CDATA[<p><strong>Ví dụ 1: Tính tổng S = 1 +2 +3 + … + N (Với N được nhập vào từ bàn phím)</strong></p><p>Hướng dẫn:</p><p>- Khai báo biến N, biến S để lưu tổng, biến i làm biến đếm</p><p>- Lúc đầu S:=0;</p><p>- Dùng vòng lặp cho i chạy từ 1 đến N, mỗi lần lặp thì biến S:=S+i;</p><p>- Ra khỏi vòng lặp in ra tổng S</p><p><strong>Ví dụ 2: &nbsp;&nbsp;&nbsp;&nbsp; Tính N! &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Với N! = 1.2.3…N, Với N được nhập vào từ bàn phím)</strong></p><p>Tương tự như bài 2. Nhưng lúc đầu ta khai báo biến tích P:=1 (Vì gán bằng 0 thì tích sẽ bằng 0)</p><p>Hướng dẫn:</p><p>- Dùng vòng for như vậy P:=P*i;</p><p>- Ra khỏi vòng lặp in ra tích P</p><p><strong>Ví dụ 3: Tính x<sup>n</sup>&nbsp; (Với n được nhập vào từ bàn phím)</strong></p><p>Hướng dẫn:</p><p>- Điều kiện ở đây n là số nguyên không âm</p><p>- Khai báo biến x, n,&nbsp; biến đếm i, biến lũy thừa có tên lt</p><p>- Nhập x, n</p><p>- Lúc đầu lt:=1;</p><p>- Dùng vòng lăp cho i chạy từ 1 đến N, mỗi lần lặp thì lt:=lt*x;</p><p>- Ra khỏi vòng lặp in ra giá trị lt</p>]]></description>
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         <pubDate>2025-10-18 07:38:45 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3638408102</guid>
      </item>
      <item>
         <title>Vi du 1. Tinh tong</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3638432570</link>
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         <pubDate>2025-10-18 08:17:48 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3638432570</guid>
      </item>
      <item>
         <title>Bài tập Câu lệnh lặp (1)</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3646780499</link>
         <description><![CDATA[<p><strong>Bài 10. Viết chương trình in ra các số lẻ nhỏ hơn hoặc bằng n (Với n được nhập vào từ bàn phím)</strong></p><p><strong>Bài 11. Viết chương trình in ra tổng các số chẵn nhỏ hơn hoặc bằng n (Với n được nhập từ bàn phím)</strong></p><p><strong>Bài 12. Viết chương trình in ra tất cả các ước của một số n (Với n được nhập từ bàn phím)</strong></p><p><strong>Bài 13. Một số có tổng các ước nhỏ hơn nó và bằng chính nó được gọi là số hoàn chỉnh (Số hoàn hảo)</strong></p><p>Ví dụ: 6 có các ước là 1, 2, 3 Tổng là 6 à là số hoàn chỉnh</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Viết chương trình xét xem một số n được nhập vào từ bàn phím có phải là số hoàn chỉnh không?</p><p><strong>Bài 14. Viết chương trình tìm các số hoàn chỉnh nhỏ hơn n (Với n được nhập từ bàn phím)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</strong></p>]]></description>
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         <pubDate>2025-10-23 05:27:46 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3646780499</guid>
      </item>
      <item>
         <title>bai 10</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3699335054</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-11-26 09:22:58 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3699335054</guid>
      </item>
      <item>
         <title>10</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3699341690</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-11-26 09:28:25 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3699341690</guid>
      </item>
      <item>
         <title>11</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700618490</link>
         <description><![CDATA[<p>cái ở trên cháu làm sai số</p>]]></description>
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         <pubDate>2025-11-27 05:44:55 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700618490</guid>
      </item>
      <item>
         <title>bai 11 tinh tong so chan</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700650570</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-11-27 06:11:28 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700650570</guid>
      </item>
      <item>
         <title>Bài tập Câu lệnh lặp (2)</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700665858</link>
         <description><![CDATA[<p><strong>Bài 15. Nhập số nguyên n. Liệt kê các số nguyên a,b,c trong khoảng 1..n để a2 + b2 = c2 (Bộ a, b, c như thế gọi là các số Pitago)</strong></p><p><strong>Bài 16. Tìm các số có 3 chữ số sao cho tổng lập phương của các chữ số bằng chính số đó (Các số Amstrong)</strong></p><p><strong>Bài 17. Viết chương trình để tìm lời giải cho bài toán sau:</strong>&nbsp;</p><p>Trong giỏ vừa thỏ vừa gà,&nbsp;</p><p>Một trăm cái cẳng bốn ba cái đầu.&nbsp;</p><p>Hỏi có mấy gà mấy thỏ?&nbsp;</p><p>Thuật giải của bài như sau :&nbsp;<br>Gọi số gà là x, số thỏ là y. Ta có hệ dưới&nbsp;<br>2*x + 4*y = 100&nbsp;<br>x + y = 43&nbsp;<br>Như vậy bài toán quy về giải hệ này. Ta dùng định thức là làm được&nbsp;<br>Tuy nhiên bài toán cần áp dụng vòng lặp for nên ta xét các trường hợp của x và y từ 0--&gt; 43 ( tổng số gà + thỏ = 43 như vậy x, y nguyên dương nhỏ hơn hoặc bằng 43) nếu x, y thỏa mãn hệ trên thì lấy làm nghiệm.&nbsp;<br><strong>Bài 18. </strong>Viết chương trình để tìm lời giải cho bài toán sau:&nbsp;</p><p>Trăm trâu trăm cỏ</p><p>Trâu đứng ăn năm</p><p>Trâu nằm ăn ba</p><p>Trâu già ba con một bó.</p><p>Hỏi có bao nhiêu con mỗi loại?</p><p><strong>Bài 19. </strong>Viết chương trình để tìm lời giải cho bài toán sau:&nbsp;</p><p>Quýt, cam mười bảy quả tươi</p><p>Đem chia cho một trăm người cùng vui</p><p>Chia ba mỗi quả quýt rồi</p><p>Còn cam mỗi quả chia mười vẫn xinh</p><p>Trăm người, trăm miếng ngọt lành</p><p>Quýt, cam mỗi loại tính rành là bao?</p><p>Hỏi có bao nhiêu quýt, bao nhiêu cam?</p>]]></description>
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         <pubDate>2025-11-27 06:24:41 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700666778</link>
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         <pubDate>2025-11-27 06:25:37 UTC</pubDate>
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      <item>
         <title>12</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700672442</link>
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         <pubDate>2025-11-27 06:30:21 UTC</pubDate>
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      <item>
         <title>11</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700688623</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-11-27 06:43:46 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700688623</guid>
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      <item>
         <title>13</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700696760</link>
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         <pubDate>2025-11-27 06:50:12 UTC</pubDate>
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      <item>
         <title>Bài tập Câu lệnh điều kiện</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3700701969</link>
         <description><![CDATA[<p>Bài 1. Viết chương trình in ra số lớn hơn (so sánh 2 số) trong 2 số (được nhập vào từ bàn phím)</p><p>Bài 2: Viết chương trình nhập vào 3 cạnh của một tam giác. Xét xem:</p><p>a.&nbsp;&nbsp;&nbsp; Tam giác đó có phải là tam giác đều hay không</p><p>b.&nbsp;&nbsp;&nbsp; Tam giác đó có phải là tam giác cân hay không</p><p>c.&nbsp;&nbsp;&nbsp; Tam giác đó có phải là tam giác vuông hay không</p><p>Bài 3: Viết chương trình giải phương trình ax + b = 0 . Các hệ số a, b được nhập vào từ bàn phím</p><p>Bài 4: Nhập 3 số a, b, c</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; Xét xem a, b, c có lập thành 3 cạnh của 1 tam giác hay không?</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; Nếu có, hãy tính diện tích và chu vi tam giác đó</p><p>Hướng dẫn:</p><p><strong>Tính diện tích tam giác khi biết 3 cạnh</strong></p><p>Khi biết độ dài ba cạnh của tam giác, ta có thể áp dụng công thức Heron để tính diện tích:</p><ul><li><p><strong>p = (a + b + c) / 2</strong>&nbsp;(với a, b, c là độ dài ba cạnh tam giác, p là nửa chu vi)</p></li><li><p><strong>S = √[p*(p - a)*(p - b)*(p - c)]</strong></p></li></ul><p>Bài 5: Nhập tọa độ M(x,y) của điểm M nằm trên mặt phẳng. Cho biết M nằm trên góc phần tư nào của mặt phẳng?</p><p>Bài 6: VCT tính chỉ số khối cơ thể BMI theo công thức</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; BMI = W/H<sup>2</sup></p><p>Trong đó: W: cân nặng của 1 người (kg)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; H: chiều cao của người đó (m)</p><p>Nếu BMI &lt; 18,5: Người gầy</p><p>Nếu 18,5 &lt; BMI &lt; 25 then: Người bình thường</p><p>Nếu BMI &gt;= 25: người béo</p><p>Và cho biết người đó thuộc loại nào?</p><p>Bài 7: Tiền điện</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Hàng tháng các hộ dân trong thành phố đều nhận được hóa đơn tiền điện. Tiền điện tiêu dùng của mỗi hộ gia đình được tính như sau:</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; 100 số đầu tiên: mỗi số phải trả 550 đồng</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; Từ 100 đến 150 số: mỗi số phải trả 1110 đồng</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; Từ 150 đến 200 số: mỗi số phải trả 1470 đồng</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; Trên 200 số: mỗi số phải trả 1600 đồng</p><p>-&nbsp;&nbsp;&nbsp;&nbsp; Số tiền phải trả là số tiền tính được cộng thêm 10% thuế VAT</p><p>Hãy tính số tiền điện phải trả cho 1 tháng?</p><p>Ví dụ:&nbsp; Nhà mình dùng 270 chữ:</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 100 x 550 đồng = 55 000đ</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 50 x 1110 đồng =</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 50 x 1470 đồng =</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 70 x 1600 đồng =</p><p>Bài 8. Em còn nhớ trò chơi “Oẳn tù tì”, đó là trò chơi mà hai người đồng thời đưa bàn tay ra dưới dạng: Giấy (xòe), đá (nắm tai lại)... Biết rằng: Kéo thắng giấy, Giấy thắng đá, Đá thắng kéo. VCT mô tả trò chơi trên</p><p>Hướng dẫn:</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Kí hiệu 2 người chơi là Người1 và Người2</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ta viết Người i = a để chỉ Người i đưa bàn tay ra dưới dạng a, thì i có thể là 1 hoặc 2 và a thuộc tập hợp {Giấy, kéo, đá}</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Trò chơi sẽ được mô tả:</p><p>a. Nếu Người1 = “Kéo” thì</p><p>&nbsp;&nbsp;&nbsp; Nếu Người2 = “Giấy” thì Người 1 thắng và kết thúc;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ngược lại, nếu Người2 = “Đá” thì Người2 thắng và kết thúc;</p><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ngược lại, hòa và kết thúc.</p><p>b. Nếu Người1 = “Giấy” thì ………</p><p>c. Nếu Người1 = “Đá” thì ……..</p><p>Bài 9: UCLN của 2 số nguyên dương a và b kí hiệu UCLN(a,b), có thể được tính bằng 1 trong 2 thuật toán:</p><p>a. Thuật toán trừ liên tiếp: ta lấy số lớn trừ cho số bé. Sau đó lại xét hai số là số nhỏ hơn và hiệu vừa nhận được… tiếp tục quá trình đó cho đến khi được hai số bằng nhau, đó chính là UCLN(a,b)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B1: Nhập a,b &gt;0</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B2: Nếu a=b, chuyển tới B5</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B3: Nếu a&gt;b, gán a:=a-b; ngược lại b:=b-a;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B4: Quay lại B2</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B5: In ra a (a là UCLN)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B6: Kết thúc</p><p>b. Thuật toán chia liên tiếp: Xét 2 số a, b. Tính r là số dư của phép chia a cho b. Nếu số dư r khác 0 thì xét cặp số a (bằng b), b (bằng r)… Kết thúc quá trình lặp (r=0), b chính là UCLN</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B1: Nhập a,b &gt;0</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B2: r:=a mod b;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B3: Nếu r khác 0, a:=b; b:=r;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B4: r:= a mod b. Quay lại B3</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B5: In ra b là UCLN</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B6: Kết thúc</p><p>Câu hỏi:</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; VCT tính UCLN(a,b), BCNN(a,b) bằng 2 thuật toán trên.</p>]]></description>
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         <pubDate>2025-11-27 07:22:16 UTC</pubDate>
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         <title>12</title>
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         <pubDate>2025-11-27 07:42:34 UTC</pubDate>
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         <title>Bài 14 tham khảo</title>
         <author>nhudainguyen</author>
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         <pubDate>2025-11-27 07:42:52 UTC</pubDate>
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         <title>bài gà thỏ.</title>
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         <pubDate>2025-12-03 04:54:01 UTC</pubDate>
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         <description><![CDATA[<p><strong>Bài 17. Viết chương trình để tìm lời giải cho bài toán sau:</strong>&nbsp;</p><p>Trong giỏ vừa thỏ vừa gà,&nbsp;</p><p>Một trăm cái cẳng bốn ba cái đầu.&nbsp;</p><p>Hỏi có mấy gà mấy thỏ?&nbsp;</p>]]></description>
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         <pubDate>2025-12-03 05:36:19 UTC</pubDate>
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         <pubDate>2025-12-03 09:37:39 UTC</pubDate>
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         <title>bai 15</title>
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         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3708344273</link>
         <description><![CDATA[<p>sai toan tap=(</p><p><br/></p>]]></description>
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         <pubDate>2025-12-03 09:44:08 UTC</pubDate>
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         <pubDate>2025-12-04 06:18:54 UTC</pubDate>
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         <title>bài 15( đúngg)</title>
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         <pubDate>2025-12-04 07:00:02 UTC</pubDate>
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         <title>bài 16</title>
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         <pubDate>2025-12-04 07:52:42 UTC</pubDate>
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         <pubDate>2025-12-04 08:18:56 UTC</pubDate>
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         <title>bài 18</title>
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         <pubDate>2025-12-04 08:27:32 UTC</pubDate>
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         <title></title>
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         <description><![CDATA[<p>Bài 19: Viết chương trình để tìm lời giải cho bài toán sau:&nbsp;</p><p>Quýt, cam mười bảy quả tươi</p><p>Đem chia cho một trăm người cùng vui</p><p>Chia ba mỗi quả quýt rồi</p><p>Còn cam mỗi quả chia mười vẫn xinh</p><p>Trăm người, trăm miếng ngọt lành</p><p>Quýt, cam mỗi loại tính rành là bao?</p><p>Hỏi có bao nhiêu quýt, bao nhiêu cam?</p>]]></description>
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         <pubDate>2025-12-04 11:50:54 UTC</pubDate>
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         <title>Ví dụ Thuật toán tìm kiếm tuần tự</title>
         <author>nhudainguyen</author>
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         <pubDate>2025-12-06 07:22:43 UTC</pubDate>
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         <title>Ví dụ 2. Tìm kiếm tuần tự  (Định nghĩa)</title>
         <author>nhudainguyen</author>
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         <pubDate>2025-12-06 07:56:25 UTC</pubDate>
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         <title>LinkMột số minh họa cho chủ đề 5. Giải quyết vấn đề với sự trợ giúp của máy tính</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3718841552</link>
         <description><![CDATA[<p><strong>Một số minh họa cho chủ đề 5. Giải quyết vấn đề với sự trợ giúp của máy tính</strong></p><p>●&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Sắp xếp nổi bọt</p><p><a rel="noopener noreferrer nofollow" href="https://scratch.mit.edu/projects/560005894/fullscreen/">https://scratch.mit.edu/projects/560005894/fullscreen/</a></p><p>●&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Sắp xếp chọn</p><p><a rel="noopener noreferrer nofollow" href="https://scratch.mit.edu/projects/555746387/fullscreen/">https://scratch.mit.edu/projects/555746387/fullscreen/</a></p><p>●&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Sắp xếp chèn</p><p><a rel="noopener noreferrer nofollow" href="https://scratch.mit.edu/projects/555830133/fullscreen/">https://scratch.mit.edu/projects/555830133/fullscreen/</a></p><p>●&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tìm kiếm nhị phân</p><p><a rel="noopener noreferrer nofollow" href="https://scratch.mit.edu/projects/596294573/fullscreen/">https://scratch.mit.edu/projects/596294573/fullscreen/</a></p>]]></description>
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         <pubDate>2025-12-11 06:16:13 UTC</pubDate>
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         <pubDate>2025-12-11 06:30:43 UTC</pubDate>
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         <title>Thuật toán sắp xếp</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3719000541</link>
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         <pubDate>2025-12-11 08:45:42 UTC</pubDate>
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         <title>Tim kiem tuan tu</title>
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         <pubDate>2025-12-13 07:20:15 UTC</pubDate>
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         <title>Sap xep</title>
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         <pubDate>2025-12-13 07:20:51 UTC</pubDate>
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         <title></title>
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         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3721295321</link>
         <description><![CDATA[<p>bài đang làm dở</p>]]></description>
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         <pubDate>2025-12-13 08:44:51 UTC</pubDate>
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         <title>sap xep nhi phan ( chua hthanh)</title>
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         <pubDate>2025-12-18 05:46:35 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3727036649</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-18 06:07:22 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3727036649</guid>
      </item>
      <item>
         <title>Tìm kiếm nhị phân</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3727137077</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-18 07:48:52 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3727137077</guid>
      </item>
      <item>
         <title>tim kiem nhị phan ( complete)</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3727141843</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-18 07:53:52 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3727141843</guid>
      </item>
      <item>
         <title>Đề 1</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3729032524</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-20 08:01:04 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3729032524</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3732406666</link>
         <description><![CDATA[<p>bài 1 đề 2</p><p><br/></p>]]></description>
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         <pubDate>2025-12-25 07:58:59 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3732406666</guid>
      </item>
      <item>
         <title>bài 1 đề 2</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3732408200</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-25 08:04:05 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3732408200</guid>
      </item>
      <item>
         <title>Thuật toán UCLN</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3732416169</link>
         <description><![CDATA[<p>UCLN của 2 số nguyên dương a và b kí hiệu UCLN(a,b), có thể được tính bằng 1 trong 2 thuật toán:</p><p>a. Thuật toán trừ liên tiếp: ta lấy số lớn trừ cho số bé. Sau đó lại xét hai số là số nhỏ hơn và hiệu vừa nhận được… tiếp tục quá trình đó cho đến khi được hai số bằng nhau, đó chính là UCLN(a,b)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B1: Nhập a,b &gt;0</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B2: Nếu a=b, chuyển tới B5</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B3: Nếu a&gt;b, gán a:=a-b; ngược lại b:=b-a;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B4: Quay lại B2</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B5: In ra a (a là UCLN)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B6: Kết thúc</p><p>b. Thuật toán chia liên tiếp: Xét 2 số a, b. Tính r là số dư của phép chia a cho b. Nếu số dư r khác 0 thì xét cặp số a (bằng b), b (bằng r)… Kết thúc quá trình lặp (r=0), b chính là UCLN</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B1: Nhập a,b &gt;0</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B2: r:=a mod b;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B3: Nếu r khác 0, a:=b; b:=r;</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B4: r:= a mod b. Quay lại B3</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B5: In ra b là UCLN</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B6: Kết thúc</p>]]></description>
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         <pubDate>2025-12-25 08:29:25 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3732416169</guid>
      </item>
      <item>
         <title>bài 2 đề 2</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3733202460</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-27 08:09:04 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3733202460</guid>
      </item>
      <item>
         <title>Bài 2 đề 2</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3733210477</link>
         <description><![CDATA[]]></description>
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         <pubDate>2025-12-27 08:46:19 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3733210477</guid>
      </item>
      <item>
         <title>bai 1 de 3</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3743901747</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-08 06:41:58 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3743901747</guid>
      </item>
      <item>
         <title>bài 2 đề 3</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3743988880</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-08 08:00:29 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3743988880</guid>
      </item>
      <item>
         <title>Bài 3 đề 3</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3751997574</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-15 08:52:00 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3751997574</guid>
      </item>
      <item>
         <title>Trò chơi lấy bóng</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3754727420</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-18 11:03:43 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3754727420</guid>
      </item>
      <item>
         <title>Điều khiển ô tô</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3754729587</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-18 11:09:29 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3754729587</guid>
      </item>
      <item>
         <title>bài 2 đề 4</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3754766409</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-18 12:38:42 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3754766409</guid>
      </item>
      <item>
         <title>Chuyển số thập phân thành xâu nhị phân </title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3760060164</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-22 08:18:01 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3760060164</guid>
      </item>
      <item>
         <title>Chuyển xâu nhị phân thành số thập phân</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3760060841</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-22 08:18:24 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3760060841</guid>
      </item>
      <item>
         <title></title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3762595583</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://mindx.edu.vn/blog/huong-dan-lam-phim-hoat-hinh-khong-can-chuyen-gia-voi-scratch-phan-mem-lap-trinh-don-gian-va-hieu-qua" />
         <pubDate>2026-01-24 06:33:15 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3762595583</guid>
      </item>
      <item>
         <title></title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3762595747</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-24 06:33:32 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3762595747</guid>
      </item>
      <item>
         <title>Ảnh</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771181947</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 01:20:53 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771181947</guid>
      </item>
      <item>
         <title>Rùa</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182216</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 01:21:53 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182216</guid>
      </item>
      <item>
         <title>1</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182311</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 01:22:06 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182311</guid>
      </item>
      <item>
         <title>2</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182509</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 01:22:47 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182509</guid>
      </item>
      <item>
         <title>3</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182577</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 01:22:59 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182577</guid>
      </item>
      <item>
         <title>4</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182666</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 01:23:11 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771182666</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771229288</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/5115309740/4cb82cf6fd78d943abf0721cb0608c76/004_K9.rar" />
         <pubDate>2026-01-31 03:38:12 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771229288</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771229636</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-01-31 03:39:29 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3771229636</guid>
      </item>
      <item>
         <title>Bài 1 Số chính phương</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3778401591</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-02-05 08:39:19 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3778401591</guid>
      </item>
      <item>
         <title>Bài 2. Cước phí</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3778401914</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-02-05 08:39:39 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3778401914</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3781207139</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-02-07 16:44:34 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3781207139</guid>
      </item>
      <item>
         <title>chuyển số n thành tích các thừa số ntố</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805844109</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads-usc1.storage.googleapis.com/5240228429/95516fdd5670d0539e2f0e9f16a4655d/D___n_Scratch.sb3" />
         <pubDate>2026-02-28 06:06:51 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805844109</guid>
      </item>
      <item>
         <title>Đề khảo sát</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805858989</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-02-28 06:53:28 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805858989</guid>
      </item>
      <item>
         <title>Bài 3. Tìm số</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805865720</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-02-28 07:15:47 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805865720</guid>
      </item>
      <item>
         <title>ucln bcnn</title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805871799</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-02-28 07:31:40 UTC</pubDate>
         <guid>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3805871799</guid>
      </item>
      <item>
         <title>File dạy</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3807383318</link>
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         <title>sbt</title>
         <author>nhudainguyen</author>
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         <author>nhudainguyen</author>
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         <pubDate>2026-03-04 03:25:54 UTC</pubDate>
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         <title></title>
         <author>nhudainguyen</author>
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         <title></title>
         <author></author>
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         <pubDate>2026-03-04 23:24:53 UTC</pubDate>
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         <pubDate>2026-03-05 03:19:41 UTC</pubDate>
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         <title></title>
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         <pubDate>2026-03-05 03:26:22 UTC</pubDate>
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         <title></title>
         <author></author>
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         <pubDate>2026-03-05 07:44:13 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
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         <pubDate>2026-03-05 08:38:56 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
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         <pubDate>2026-03-07 06:44:27 UTC</pubDate>
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      <item>
         <title>Bài 13. IN HOA IN THUONG</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-07 07:47:02 UTC</pubDate>
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      <item>
         <title>Bài: Chuẩn hóa xâu kí tự (hoàn chỉnh)</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-07 09:04:09 UTC</pubDate>
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      <item>
         <title>Tách các số trong một chuỗi và đưa chúng vào danh sách</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-08 03:12:28 UTC</pubDate>
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      <item>
         <title>Bài 13. Họ tên in hoa - In thuong</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-08 14:48:55 UTC</pubDate>
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      <item>
         <title>Bài 13 Cách 2: Chuyển đổi Họ tên In hoa in thuong</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-08 14:53:19 UTC</pubDate>
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      <item>
         <title>Số Sinh</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-08 14:55:05 UTC</pubDate>
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      <item>
         <title>Số Song tố</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-08 14:58:01 UTC</pubDate>
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      <item>
         <title>Xóa ký tự # trong xâu</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3816375002</link>
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         <pubDate>2026-03-08 15:02:11 UTC</pubDate>
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      <item>
         <title>Bài toán số Fibonaci (dùng vòng lặp) Tim số Fibonaci thứ n</title>
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         <pubDate>2026-03-09 14:17:35 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
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         <pubDate>2026-03-10 23:08:49 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3820444052</link>
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         <pubDate>2026-03-11 03:16:07 UTC</pubDate>
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      <item>
         <title>Số BACHNUM</title>
         <author>nhudainguyen</author>
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         <pubDate>2026-03-11 04:11:48 UTC</pubDate>
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         <title></title>
         <author></author>
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         <pubDate>2026-03-11 09:32:26 UTC</pubDate>
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      <item>
         <title>Biển Số đẹp</title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3822272447</link>
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         <pubDate>2026-03-12 04:40:48 UTC</pubDate>
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      <item>
         <title></title>
         <author>nhudainguyen</author>
         <link>https://padlet.com/nhudainguyen/wrkroawvj3p5mlck/wish/3822434039</link>
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         <pubDate>2026-03-12 06:37:10 UTC</pubDate>
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         <title></title>
         <author></author>
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         <pubDate>2026-03-12 07:39:21 UTC</pubDate>
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         <title>Sắp xếp danh sách Họ và tên</title>
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      <item>
         <title>Đề Hương Thủy 24-25</title>
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         <pubDate>2026-03-12 13:54:00 UTC</pubDate>
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         <title>Câu chuyện Rùa và thỏ</title>
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         <title>Đề Phú Vang 24-25</title>
         <author>nhudainguyen</author>
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         <title></title>
         <author></author>
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         <pubDate>2026-03-13 23:22:15 UTC</pubDate>
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         <pubDate>2026-03-14 02:11:32 UTC</pubDate>
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         <title></title>
         <author></author>
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         <title>BÀI 9: TÁCH TỪ</title>
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         <title>Đề Thành phố Huế 24-25</title>
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         <title>Dãy con nguyên tố</title>
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         <title>Dãy con tăng dần</title>
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         <title>Nguyên tố đối xứng</title>
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         <title>Nguyên tố cân bằng</title>
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         <pubDate>2026-03-17 07:41:35 UTC</pubDate>
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         <pubDate>2026-03-17 07:43:20 UTC</pubDate>
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         <title>Tổng hợp các bài về dãy số</title>
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         <pubDate>2026-03-17 07:50:20 UTC</pubDate>
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         <title>Lập trình scratch tạo Game robot nhặt rác</title>
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         <pubDate>2026-03-17 08:08:45 UTC</pubDate>
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         <title>Cách vẽ hình tam giác, hình vuông,ngũ giác,lục giác,hình chữ nhật</title>
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