{"id":399,"date":"2020-10-08T09:55:33","date_gmt":"2020-10-08T07:55:33","guid":{"rendered":"http:\/\/lecahierdemath.fr\/?p=399"},"modified":"2026-01-14T23:30:52","modified_gmt":"2026-01-14T22:30:52","slug":"m3-les-unites-de-mesure-des-longueurs","status":"publish","type":"post","link":"http:\/\/lecahierdemath.fr\/index.php\/2020\/10\/08\/m3-les-unites-de-mesure-des-longueurs\/","title":{"rendered":"M3 &#8211; Les unit\u00e9s de mesure des longueurs"},"content":{"rendered":"\n<p>L&rsquo;unit\u00e9 principale de mesure des longueurs est le <span class=\"has-inline-color has-luminous-vivid-orange-color\">m\u00e8tre (m)<\/span>.<\/p>\n\n\n\n<p>Toutes les autres unit\u00e9s de mesure des longueurs sont des d\u00e9riv\u00e9es du m\u00e8tre :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">le kilom\u00e8tre (km)<\/mark> 1 km = 1 000 m<\/li><li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">l&rsquo;hectom\u00e8tre (hm)<\/mark> 1 hm = 100 m<\/li><li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">le d\u00e9cam\u00e8tre (dam)<\/mark> 1 dam = 10 m<\/li><li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-amber-color\">le d\u00e9cim\u00e8tre (dm)<\/mark> 10 dm = 1 m<\/li><li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-amber-color\">le centim\u00e8tre (cm)<\/mark> 100 cm = 1 m<\/li><li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-amber-color\">le millim\u00e8tre (mm)<\/mark> 1 000 mm = 1 m<\/li><\/ul>\n\n\n\n<p>Pour convertir des unit\u00e9s de mesure des longueurs, on utilise un tableau de conversion.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.fmaths.com\/conversion\/cours\/tableauconversion.gif\" alt=\"Je r\u00e9ponds \u2013 Apprendre\u2026 Autrement !\" width=\"587\" height=\"188\"\/><\/figure>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><a href=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Ca3-La-multiplication.pdf\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Cahier.jpg\" alt=\"\" class=\"wp-image-22\" width=\"219\" height=\"146\" srcset=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Cahier.jpg 550w, http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Cahier-300x200.jpg 300w\" sizes=\"auto, (max-width: 219px) 100vw, 219px\" \/><\/a><figcaption><a href=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/10\/M3-Les-longueurs.pdf\">la carte mentale<\/a><\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Diaporama.jpg\" alt=\"\" class=\"wp-image-23\" width=\"209\" height=\"157\" srcset=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Diaporama.jpg 672w, http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/06\/Diaporama-300x226.jpg 300w\" sizes=\"auto, (max-width: 209px) 100vw, 209px\" \/><figcaption><a href=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/10\/M3-Les-mesures-de-longueur.pptx\">Diaporama <\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-video aligncenter\"><video height=\"720\" style=\"aspect-ratio: 800 \/ 720;\" width=\"800\" controls src=\"http:\/\/lecahierdemath.fr\/wp-content\/uploads\/2020\/10\/M3-Les-mesures-de-longueur.m4v\"><\/video><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;unit\u00e9 principale de mesure des longueurs est le m\u00e8tre (m). Toutes les autres unit\u00e9s de mesure des longueurs sont des d\u00e9riv\u00e9es du m\u00e8tre : le kilom\u00e8tre (km) 1 km = 1 000 m l&rsquo;hectom\u00e8tre (hm) 1 hm = 100 m le d\u00e9cam\u00e8tre (dam) 1 dam = 10 m le d\u00e9cim\u00e8tre (dm) 10 dm = 1 m le centim\u00e8tre (cm) 100 cm = 1 m le millim\u00e8tre (mm) 1 000 mm = 1 m Pour convertir des unit\u00e9s de mesure des&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"http:\/\/lecahierdemath.fr\/index.php\/2020\/10\/08\/m3-les-unites-de-mesure-des-longueurs\/\">Lire la suite<span class=\"screen-reader-text\"> Lire la suite<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-399","post","type-post","status-publish","format-standard","hentry","category-mesures"],"_links":{"self":[{"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/posts\/399","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/comments?post=399"}],"version-history":[{"count":5,"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/posts\/399\/revisions"}],"predecessor-version":[{"id":1325,"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/posts\/399\/revisions\/1325"}],"wp:attachment":[{"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/media?parent=399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/categories?post=399"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/lecahierdemath.fr\/index.php\/wp-json\/wp\/v2\/tags?post=399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}