Bảng cộng (có nhớ) trong phạm vi 20
<p>9+2</p> <p>9+3; 8+3</p> <p>9+4; 8+4; 7+4</p> <p>9+5; 8+5; 7+5; 6+5</p> <p>9+6; 8+6; 7+6; 6+6; 5+6</p> <p>9+7; 8+7; 7+7; 6+7; 5+7; 4+7</p> <p>9+8; 8+8; 7+8; 6+8; 5+8; 4+8; 3+8</p> <p>9+9; 8+9; 7+9; 6+9; 5+9; 4+9; 3+9; 2+9</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-10-01-151611-1664612177.png.webp" width="426" height="269" alt="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-0" title="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
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</div><p></p> <h3 id="1-tiacutenh-nham">1. Tính nhẩm:</h3> <p>a) 6+5</p> <p>8+8</p> <p>9+4</p> <p>7+7</p> <p>7+9</p> <p>6+9</p> <p>b)</p> <p>8+3<br>3+8</p> <p>7+6<br>6+7</p> <p>9+5<br>5+9</p> <h3 id="2-xem-bang-cong-necircu-caacutec-pheacutep-tiacutenh-cograven-thieu">2. Xem Bảng cộng, nêu các phép tính còn thiếu:</h3> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-10-01-151820-1664612306.png.webp" width="551" height="353" alt="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-1" title="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-1" loading="lazy"></p> <h3 id="3">3.</h3> <p>Vườn nhà Tùng có 7 cây na và 9 cây xoài. Hỏi vườn nhà Tùng có tất cả bao nhiêu cây na và cây xoài?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-10-01-151940-1664612388.png.webp" width="549" height="211" alt="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-2" title="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-2" loading="lazy"></p> <p>Phép tính: <img src="/uploads/tinymce/anh-chup-man-hinh-2022-10-01-145228-1664612411.png.webp" width="182" height="43" alt="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-3" title="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-3" loading="lazy"></p> <p>Trả lời: Vườn nhà tùng có tất cả <img src="/uploads/tinymce/anh-chup-man-hinh-2022-10-01-145321-1664612443.png.webp" width="36" height="32" alt="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-4" title="hinh-anh-bang-cong-co-nho-trong-pham-vi-20-1054-4" loading="lazy"> cây na và cây xoài.</p> <p>&nbsp;</p>