Bài 27: Thực Hành Ước Lượng Và Đo Độ Dài
<h3 id="khaacutem-phaacute">Khám phá</h3> <p>Chọn số đo độ dài phù hợp của mỗi đồ vật trong thực tế.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/361-1662097857.png.webp" width="310" height="106" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-0" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div>35 cm; 12 cm<p></p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/362-1662097875.png.webp" width="123" height="112" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-1" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-1" loading="lazy">4 cm; 3 gang tay</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/363-1662097884.png.webp" width="255" height="94" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-2" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-2" loading="lazy">30 cm; 1 gang tay</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/364-1662097891.png.webp" width="211" height="97" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-3" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-3" loading="lazy">20 cm; 8 cm</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/365-1662097963.png.webp" width="556" height="217" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-4" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-4" loading="lazy">5 gang tay; 25 cm</p> <h3 id="hoat-dong">Hoạt động</h3> <h4>1. Số?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/371-1662098066.png.webp" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-5" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-5" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div>Bảng dài khoảng 4 sải tay.<p></p> <p>Đo chiều dài bảng lớp em bằng sải tay.</p> <p>Bảng lớp em dài khoảng ... sải tay.</p> <h4>2. Số?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/372-1662098159.png.webp" width="706" height="364" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-6" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-6" loading="lazy">Đo phòng học lớp em bằng bước chân.</p> <p>Một chiều phòng học lớp em dài khoảng ... bước chân.</p> <h3 id="luyen-tap">Luyện tập</h3> <h4>1.</h4> <p>a) Nêu độ dài của mỗi đồ chơi.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/381-1662098212.png.webp" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-7" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-7" loading="lazy"><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/382-1662098222.png.webp" width="703" height="61" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-8" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-8" loading="lazy">b) Đồ chơi nào dài nhất?</p> <p>c) Có bao nhiêu xe ngắn hơn xe khách?</p> <h4>2. Đo độ dài các đồ vật. Đồ vật nào dài nhất?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/391-1662098267.png.webp" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-9" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-9" loading="lazy"></p> <h4>3. Bút chì nào dài hơn 8 cm?</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/392-1662098336.png.webp" width="718" height="450" alt="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-10" title="hinh-anh-bai-27-thuc-hanh-uoc-luong-va-do-do-dai-334-10" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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