Bài 7: Hình Vuông, Hình Tròn, Hình Tam Giác, Hình Chữ Nhật
<h3 id="khaacutem-phaacute">Khám phá</h3> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/461-1661331222.png.webp" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-0" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div><p></p> <h3 id="hoat-dong">Hoạt động</h3> <h4>1. Mỗi đồ vật có dạng hình gì?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/462-1661331252.png.webp" width="562" height="312" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-1" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-1" loading="lazy"></p> <h4>2.</h4> <p>a) Những hình nào là hình tròn?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/471-1661331334.png.webp" width="640" height="138" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-2" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-2" loading="lazy">b) Những hình nào là hình tam giác?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/472-1661331349.png.webp" width="639" height="130" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-3" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-3" loading="lazy">c) Những hình nào là hình vuông?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/473-1661331363.png.webp" width="652" height="153" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-4" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-4" loading="lazy">d) Những hình nào là hình chữ nhật?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/474-1661331380.png.webp" width="655" height="169" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-5" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-5" 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>3. Trong hình sau có bao nhiêu hình vuông? Bao nhiêu hình tròn? Bao nhiêu hình tam giác?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/475-1661331435.png.webp" width="382" height="201" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-6" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-6" loading="lazy"></p> <h3 id="luyen-tap">Luyện tập</h3> <h4>1. Có bao nhiêu hình tròn? Bao nhiêu hình vuông? Bao nhiêu hình tam giác? Bao nhiêu hình chữ nhật?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/481-1661331545.png.webp" width="727" height="489" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-7" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-7" loading="lazy"></p> <h4>2. Các que tính được xếp thành hình dưới đây. Trong hình đó có bao nhiêu hình vuông? Bao nhiêu hình tam giác?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/482-1661331585.png.webp" width="280" height="307" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-8" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-8" loading="lazy"></p> <p>&nbsp;</p> <h4>3. Có bao nhiêu hình vuông, hình tròn, hình tam giác, hình chữ nhật trong mỗi hình sau?</h4> <p>a)<img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/491-1661331609.png.webp" width="214" height="196" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-9" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-9" loading="lazy"></p> <p>b)<img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/492-1661331626.png.webp" width="175" height="219" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-10" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-10" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
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</div><p></p> <p>c)<img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/493-1661331635.png.webp" width="246" height="205" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-11" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-11" loading="lazy"></p> <table style="border-collapse: collapse; width: 99.9265%;" border="1"> <tbody> <tr> <td style="width: 16.9242%; text-align: center;">&nbsp;</td> <td style="width: 16.9242%; text-align: center;">Hình tròn</td> <td style="width: 16.9242%; text-align: center;">Hình chữ nhật</td> <td style="width: 16.9242%; text-align: center;">Hình tam giác</td> <td style="width: 16.9334%; text-align: center;">Hình vuông</td> </tr> <tr> <td style="width: 16.9242%; text-align: center;">a)</td> <td style="width: 16.9242%; text-align: center;">2</td> <td style="width: 16.9242%; text-align: center;">?</td> <td style="width: 16.9242%; text-align: center;">3</td> <td style="width: 16.9334%; text-align: center;">?</td> </tr> <tr> <td style="width: 16.9242%; text-align: center;">b)</td> <td style="width: 16.9242%; text-align: center;">?</td> <td style="width: 16.9242%; text-align: center;">1</td> <td style="width: 16.9242%; text-align: center;">?</td> <td style="width: 16.9334%; text-align: center;">0</td> </tr> <tr> <td style="width: 16.9242%; text-align: center;">c)</td> <td style="width: 16.9242%; text-align: center;">?</td> <td style="width: 16.9242%; text-align: center;">3</td> <td style="width: 16.9242%; text-align: center;">?</td> <td style="width: 16.9334%; text-align: center;">0</td> </tr> </tbody> </table> <h4>4. Những hình nào không là hình vuông?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/494-1661331749.png.webp" width="712" height="270" alt="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-12" title="hinh-anh-bai-7-hinh-vuong-hinh-tron-hinh-tam-giac-hinh-chu-nhat-196-12" loading="lazy"></p>