Bài 30: Phép Cộng Số Có Hai Chữ Số Với Số Có Hai Chữ Số
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</div><p></p> <table style="border-collapse: collapse; width: 12.5309%;" border="1"> <tbody> <tr> <td style="width: 50.4108%; text-align: center;">Chục</td> <td style="width: 49.5977%; text-align: center;">Đơn vị</td> </tr> <tr> <td style="width: 50.4108%; text-align: center;"> <p>3</p> <p>+</p> <p>1</p> </td> <td style="width: 49.5977%; text-align: center;"> <p>2</p> <p>&nbsp;</p> <p>5</p> </td> </tr> <tr> <td style="width: 50.4108%; text-align: center;">4</td> <td style="width: 49.5977%; text-align: center;">5</td> </tr> </tbody> </table> <ul> <li><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/482-1662102271.png.webp" width="84" height="129" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-1" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-1" loading="lazy">2 cộng 5 bằng 7, viết 7.</li> <li>3 cộng 1 bằng 4, viết 4.</li> </ul> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/483-1662102318.png.webp" width="297" height="246" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-2" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-2" loading="lazy"></p> <table style="border-collapse: collapse; width: 13.3663%;" border="1"> <tbody> <tr> <td style="width: 49.6766%; text-align: center;">Chục</td> <td style="width: 50.3302%; text-align: center;">Đơn vị</td> </tr> <tr> <td style="width: 49.6766%; text-align: center;"> <p>2</p> <p>+</p> <p>3</p> </td> <td style="width: 50.3302%; text-align: center;"> <p>4</p> <p>&nbsp;</p> <p>0</p> </td> </tr> <tr> <td style="width: 49.6766%; text-align: center;">5</td> <td style="width: 50.3302%; text-align: center;">4</td> </tr> </tbody> </table> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/484-1662102348.png.webp" width="79" height="124" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-3" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-3" loading="lazy"></p> <ul> <li>4 cộng 0 bằng 4, viết 4.</li> <li>2 cộng 3 bằng 5, viết 5.</li> </ul> <h3 id="hoat-dong">Hoạt động</h3> <h4>1. Tính:</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/485-1662102442.png.webp" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-4" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-4" loading="lazy"></p> <h4>2. Đặt tính rồi tính.</h4> <p>13 + 21; 15 + 64; 34 + 40; 83 + 15</p> <h4>3. Tìm chỗ đỗ cho trực thăng.</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/491-1662102492.png.webp" width="721" height="346" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-5" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-5" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div><p></p> <h4>4. Có hai cây cà chua trong vườn. Một cây có 10 quả, một cây có 26 quả. Hỏi cả hai cây có bao nhiêu quả cà chua?</h4> <p>... + ... = ...</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/492-1662102534.png.webp" width="432" height="310" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-6" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-6" loading="lazy"></p> <h3 id="luyen-tap">Luyện tập</h3> <h4>1. Đặt tính rồi tính.</h4> <p>10 + 47; 23 + 54; 61 + 35; 58 + 41</p> <h4>2. Quả xoài nào ghi phép tính có kết quả lớn nhất? Quả xoài nào ghi phép tính có kết quả bé nhất?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/501-1662102625.png.webp" width="670" height="244" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-7" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-7" loading="lazy"></p> <h4>3. Trên cây có 15 con chim. Lát sau có thêm 24 con chim bay đến đậu cùng. Hỏi lúc này trên cây có tất cả bao nhiêu con chim?</h4> <p>... + ... = ...</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/502-1662102672.png.webp" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-8" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-8" loading="lazy"></p> <h4>4. Tính nhẩm (theo mẫu).</h4> <p>30 + 20 = ...</p> <p>3 chục + 2 chục = 5 chục</p> <p>30 + 20 = 50</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/511-1662102716.png.webp" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-9" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-9" loading="lazy">a) 10 + 50</p> <p>20 + 40</p> <p>30 + 30</p> <p>b) 30 + 40</p> <p>40 + 30</p> <p>20 + 50</p> <p>c) 10 + 20</p> <p>10 + 30</p> <p>10 + 40</p> <h4>5. Tìm số bị rơi mất trong mỗi chiếc lá có dấu "?".</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/512-1662102779.png.webp" alt="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-10" title="hinh-anh-bai-30-phep-cong-so-co-hai-chu-so-voi-so-co-hai-chu-so-339-10" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
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