Mi-li-mét
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</div><p></p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b11-h2-1666272497.jpg.webp" width="535" height="283" alt="hinh-anh-mi-li-met-1722-1" title="hinh-anh-mi-li-met-1722-1" loading="lazy"></p> <h3 id="1-quan-saacutet-caacutec-manh-giay">1. Quan sát các mảnh giấy.</h3> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b11-h3-1666272564.jpg.webp" width="610" height="135" alt="hinh-anh-mi-li-met-1722-2" title="hinh-anh-mi-li-met-1722-2" loading="lazy"></p> <p><strong>a) Đo độ dài các mảnh giấy.</strong></p> <p>Mảnh giấy màu xanh dài .?. mm.</p> <p>Mảnh giấy màu vàng dài .?. mm.</p> <p>Mảnh giấy màu đỏ dài .?. mm.</p> <p><strong>b) Tính tổng độ dài ba mảnh giấy.</strong></p> <p>.?. mm + .?. mm + .?. mm = .?. mm hay .?. cm</p> <h3 id="2-tigravem-hieu-quan-he-giua-meacutet-de-xi-meacutet-vagrave-mi-li-meacutet">2. Tìm hiểu quan hệ giữa mét, đề-xi-mét và mi-li-mét.</h3> <p>a) Đếm thêm 10 mm trên cây thước của học sinh.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b11-h4-1666272943.jpg.webp" width="622" height="137" alt="hinh-anh-mi-li-met-1722-3" title="hinh-anh-mi-li-met-1722-3" loading="lazy"></p> <p>1 dm = 10 cm</p> <p>1 dm = 100 mm</p> <p>Ví dụ: Mười mi-li-mét, hai mươi mi-li-mét, ..., một trăm mi-li-mét.</p> <p>b) Đếm thêm 100 mm trên cây thước mét.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b11-h5-1666273116.jpg.webp" width="632" height="252" alt="hinh-anh-mi-li-met-1722-4" title="hinh-anh-mi-li-met-1722-4" loading="lazy"></p> <p>1 m = 10 dm</p> <p>1 m = 1000 mm</p> <p>Ví dụ: Một trăm mi-li-mét, hai trăm mi-li-mét, ..., một nghìn mi-li-mét.</p> <h3 id="bagravei-tap-1-so">Bài tập 1: Số ?</h3> <p>a) 1 cm = .?. mm&nbsp; ;&nbsp; 5 cm = .?. mm</p> <p>b) 30 mm = .?. cm&nbsp; ;&nbsp; 80 mm = .?. cm</p> <h3 id="bagravei-tap-2-so">Bài tập 2: Số ?</h3> <p>a) 3 mm + .?. mm = 1 cm</p> <p>b) 16 mm + .?. mm = 3 cm</p> <h3 id="bagravei-tap-3-thay-bang-mm-cm-dm-hay-m">Bài tập 3: Thay .?. bằng mm, cm, dm hay m?</h3> <p>a) Chiếc bút chì dài khoảng 15 .?.</p> <p>b) Cột đèn đường cao khoảng 8 .?.</p> <p>c) Bề dày cuốn sách Toán 3 khoảng 5 .?.&nbsp;</p> <p>d) Gang tay cô giáo em dài khoảng 2 .?.</p> <h3 id="bagravei-tap-4">Bài tập 4:</h3> <p>Chiều dài con kiến này&nbsp;<em>lớn hơn</em>,&nbsp;<em>bé hơn&nbsp;</em>hay&nbsp;<em>bằng&nbsp;</em>1 cm?</p> <p>Em ước lượng rồi đo để kiểm tra.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b11-h6-1666273664.jpg.webp" width="407" height="243" alt="hinh-anh-mi-li-met-1722-5" title="hinh-anh-mi-li-met-1722-5" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
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