Ôn tập bảng đơn vị đo độ dài
<h3 style="text-align: justify;" id="bagravei-1">Bài 1.</h3> <p style="text-align: justify;">a) Viết cho đầy đủ bảng đơn vị đo độ dài sau:</p> <table style="border-collapse: collapse; width: 100%;" border="1"> <tbody> <tr> <td style="width: 42.7509%; text-align: center;" colspan="3"><strong><span style="text-align: justify;">Lớn hơn mét</span></strong></td> <td style="width: 14.2193%; text-align: center;"><strong><span style="text-align: justify;">Mét</span></strong></td> <td style="width: 43.0297%; text-align: center;" colspan="3"><strong><span style="text-align: justify;">Bé hơn mét</span></strong></td> </tr> <tr> <td style="width: 14.1264%; text-align: center;"><span style="text-align: justify;">km</span></td> <td style="width: 14.3123%; text-align: center;"><span style="text-align: justify;">hm</span></td> <td style="width: 14.3123%; text-align: center;"><span style="text-align: justify;">dam</span></td> <td style="width: 14.2193%; text-align: center;"><span style="text-align: justify;">m</span></td> <td style="width: 14.3123%; text-align: center;"><span style="text-align: justify;">dm</span></td> <td style="width: 14.3123%; text-align: center;"><span style="text-align: justify;">cm</span></td> <td style="width: 14.4052%; text-align: center;"><span style="text-align: justify;">mm</span></td> </tr> <tr> <td style="width: 14.1264%;">&nbsp;</td> <td style="width: 14.3123%;">&nbsp;</td> <td style="width: 14.3123%;">&nbsp;</td> <td style="width: 14.2193%;"> <p style="text-align: justify;">1m</p> <p style="text-align: justify;">= 10dm</p> <p style="text-align: justify;">= <mjx-container class="MathJax CtxtMenu_Attached_0" jax="CHTML" tabindex="0" ctxtmenu_counter="0" style="font-size: 116.7%; position: relative;"><mjx-math class="MJX-TEX" aria-hidden="true"><mjx-mfrac><mjx-frac><mjx-num><mjx-nstrut></mjx-nstrut><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c31"></mjx-c></mjx-mn></mjx-num><mjx-dbox><mjx-dtable><mjx-line></mjx-line><mjx-row><mjx-den><mjx-dstrut></mjx-dstrut><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c31"></mjx-c><mjx-c class="mjx-c30"></mjx-c></mjx-mn></mjx-den></mjx-row></mjx-dtable></mjx-dbox></mjx-frac></mjx-mfrac></mjx-math><mjx-assistive-mml unselectable="on" display="inline"><math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>10</mn></mfrac></math></mjx-assistive-mml></mjx-container>dam</p> </td> <td style="width: 14.3123%;">&nbsp;</td> <td style="width: 14.3123%;">&nbsp;</td> <td style="width: 14.4052%;">&nbsp;</td> </tr> </tbody> </table> <p style="text-align: justify;">b) Nhận xét: Hai đơn vị đo độ dài liền nhau:</p> <p style="text-align: justify;">- Đơn vị lớn gấp 10 lần đơn vị bé;</p> <p style="text-align: justify;">- Đơn vị bé bằng <mjx-container class="MathJax CtxtMenu_Attached_0" jax="CHTML" tabindex="0" ctxtmenu_counter="1" style="font-size: 116.7%; position: relative;"><mjx-math class="MJX-TEX" aria-hidden="true"><mjx-mfrac><mjx-frac><mjx-num><mjx-nstrut></mjx-nstrut><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c31"></mjx-c></mjx-mn></mjx-num><mjx-dbox><mjx-dtable><mjx-line></mjx-line><mjx-row><mjx-den><mjx-dstrut></mjx-dstrut><mjx-mn class="mjx-n" size="s"><mjx-c class="mjx-c31"></mjx-c><mjx-c class="mjx-c30"></mjx-c></mjx-mn></mjx-den></mjx-row></mjx-dtable></mjx-dbox></mjx-frac></mjx-mfrac></mjx-math><mjx-assistive-mml unselectable="on" display="inline"><math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>10</mn></mfrac></math></mjx-assistive-mml></mjx-container> đơn vị lớn.</p> <h3 style="text-align: justify;" id="bagravei-2">Bài 2.</h3> <p style="text-align: justify;">Viết số hoặc phân số thích hợp vào chỗ chấm:</p> <p style="text-align: justify;">a) 135m = ... dm<span style="white-space: pre;"> </span></p> <p style="text-align: justify;">&nbsp; &nbsp; 342dm =... cm</p> <p style="text-align: justify;">&nbsp; &nbsp;&nbsp;15cm =... mm</p> <p style="text-align: justify;">b) 8300m = ... dam</p> <p style="text-align: justify;">&nbsp; &nbsp;&nbsp;4000m =... hm&nbsp;</p> <p style="text-align: justify;">&nbsp; &nbsp;&nbsp;25 000m = ... km</p> <p style="text-align: justify;">c) 1mm = ... cm</p> <p style="text-align: justify;">&nbsp; &nbsp;&nbsp;1cm =... m</p> <p style="text-align: justify;">&nbsp; &nbsp;&nbsp;1m =... km</p> <h3 style="text-align: justify;" id="bagravei-3">Bài 3.</h3> <p style="text-align: justify;">Viết số thích hợp vào chỗ chấm:</p> <p style="text-align: justify;">4km 37m = ... m&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 354dm = ... m ... dm&nbsp;</p> <p style="text-align: justify;">8m 12cm = ... cm&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3040m = ... km ... m</p> <h3 style="text-align: justify;" id="bagravei-4">Bài 4.</h3> <p style="text-align: justify;">Trên tuyến đường sắt Thống Nhất, quãng đường từ Hà Nội đến Đà Nẵng dài 791 km, quãng đường từ Đà Nẵng đến Thành phố Hồ Chí Minh dài hơn quãng đường đó 144km. 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