Đề- xi- mét
<p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-201202-1664370730.png.webp" width="599" height="221" alt="hinh-anh-de-xi-met-949-0" title="hinh-anh-de-xi-met-949-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
<span class="ads-title">Advertisement</span>
<script async="" src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8123786206223951" crossorigin="anonymous" type="text/javascript" data-checked-head="true"></script>

<ins class="adsbygoogle" style="display: block; height: 0px;" data-ad-client="ca-pub-8123786206223951" data-ad-slot="2203391893" data-ad-format="auto" data-full-width-responsive="true" data-adsbygoogle-status="done"><div id="aswift_1_host" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: hidden; opacity: 0;" tabindex="0" title="Advertisement" aria-label="Advertisement"><iframe id="aswift_1" name="aswift_1" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;slotname=2203391893&amp;adk=3553368404&amp;adf=2501886532&amp;pi=t.ma~as.2203391893&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690924057&amp;rafmt=1&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fde-xi-met-949G2942.html&amp;fwr=0&amp;fwrattr=true&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690924056696&amp;bpp=3&amp;bdt=880&amp;idt=317&amp;shv=r20230731&amp;mjsv=m202307270501&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690923919%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690923919%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0&amp;nras=1&amp;correlator=3958037329158&amp;frm=20&amp;pv=1&amp;ga_vid=2049824605.1690924057&amp;ga_sid=1690924057&amp;ga_hid=345707707&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=803&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759842%2C44759875%2C44759926%2C31071258%2C31076445%2C44788442%2C31061690&amp;oid=2&amp;pvsid=1184755347603693&amp;tmod=2137688851&amp;uas=0&amp;nvt=1&amp;fc=1920&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=2&amp;rsz=%7C%7CoeEr%7C&amp;abl=CS&amp;pfx=0&amp;fu=128&amp;bc=31&amp;ifi=2&amp;uci=a!2&amp;fsb=1&amp;xpc=znhbyNud3B&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=332" data-google-container-id="a!2" data-google-query-id="CPCWk_6uvIADFWiS6QUdTSsGxw" data-load-complete="true"></iframe></div></ins>
<script type="text/javascript">
            (adsbygoogle = window.adsbygoogle || []).push({});
        </script>
</div>
</div><p></p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-201233-1664370763.png.webp" width="511" height="102" alt="hinh-anh-de-xi-met-949-1" title="hinh-anh-de-xi-met-949-1" loading="lazy"></p> <p>Đề- xi - mét là một đơn vị đo độ dài, viết tắt là dm.</p> <p>1 dm= 10cm<br>10 cm= 1dm</p> <h3 id="1-chon-the-ghi-so-do-thiacutech-hop-voi-do-vat-sau">1. Chọn thẻ ghi số đo thích hợp với đồ vật sau:</h3> <p>5 dm<br>12 dm<br>1 dm<br>5 cm</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-201438-1664370883.png.webp" width="566" height="314" alt="hinh-anh-de-xi-met-949-2" title="hinh-anh-de-xi-met-949-2" loading="lazy"></p> <h3 id="2">2.</h3> <p>a) Tìm trên thước kẻ vạch ứng với 1 dm, 2 dm.<br>b) Em hãy cho biết 2 dm bằng bao nhiêu xăng- ti- mét.</p> <h3 id="3-so">3. Số?</h3> <p>1 dm= <img src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-195403-1664370959.png.webp" width="23" height="21" alt="hinh-anh-de-xi-met-949-3" title="hinh-anh-de-xi-met-949-3" loading="lazy"> cm</p> <p>2 dm= <img src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-195403-1664370981.png.webp" width="21" height="19" alt="hinh-anh-de-xi-met-949-4" title="hinh-anh-de-xi-met-949-4" loading="lazy"> cm&nbsp;</p> <p>10 cm= <img src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-195403-1664371009.png.webp" width="24" height="23" alt="hinh-anh-de-xi-met-949-5" title="hinh-anh-de-xi-met-949-5" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
<span class="ads-title">Advertisement</span>
<script async="" src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8123786206223951" crossorigin="anonymous" type="text/javascript" data-checked-head="true"></script>

<ins class="adsbygoogle" style="display: block; height: 280px;" data-ad-client="ca-pub-8123786206223951" data-ad-slot="2203391893" data-ad-format="auto" data-full-width-responsive="true" data-adsbygoogle-status="done"><div id="aswift_2_host" style="border: none; height: 280px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block;"></div></ins>
<script type="text/javascript">
            (adsbygoogle = window.adsbygoogle || []).push({});
        </script>
</div>
</div> dm<p></p> <p>20 cm= <img src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-195403-1664371039.png.webp" width="20" height="18" alt="hinh-anh-de-xi-met-949-6" title="hinh-anh-de-xi-met-949-6" loading="lazy"> dm</p> <h3 id="4-tiacutenh-theo-mau">4. Tính (theo mẫu):</h3> <p>Mẫu: 12 dm+ 5 dm= 17 dm</p> <p>13 dm+ 6 dm<br>27 dm- 7 dm<br>10 dm+ 4 dm- 3 dm<br>48 dm- 8 dm- 10 dm</p> <h3 id="5-thuc-hagravenhnbsp">5. Thực hành:&nbsp;</h3> <p>Cắt các băng giấy (hoặc sợi dây) có độ dài 1 dm, 2 dm, 3 dm. Hãy dán băng giấy 1 dm vào vở.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/anh-chup-man-hinh-2022-09-28-214911-1664376563.png.webp" width="511" height="344" alt="hinh-anh-de-xi-met-949-7" title="hinh-anh-de-xi-met-949-7" loading="lazy"></p>