{"id":110,"date":"2022-01-04T11:51:32","date_gmt":"2022-01-04T10:51:32","guid":{"rendered":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/?p=110"},"modified":"2022-01-10T16:26:49","modified_gmt":"2022-01-10T15:26:49","slug":"exercices-sur-les-valeurs-de-base","status":"publish","type":"post","link":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/2022\/01\/04\/exercices-sur-les-valeurs-de-base\/","title":{"rendered":"Exercices sur les valeurs de base"},"content":{"rendered":"\n

Effectuer cette addition de deux nombres binaires cod\u00e9s sur 8 bits sans faire de conversion.V\u00e9rifier le r\u00e9sultat obtenu en effectuant les conversions.<\/p>\n\n\n\n

   (00110011)2<\/sub>+ (00011100)2<\/sub><\/p>\n\n\n\n

a= ((0b110011)\/2)+ ((0b011100)\/2)\nprint (a)\n\n>>> 39.5<\/pre>\n\n\n\n
 <\/p>\n\n\n\n
Recommencer avec cette nouvelle addition.<\/p>\n\n\n\n
(10110011)2<\/sub>+ (01011100 )2<\/sub><\/p>\n\n\n\n
a= ((1b110011)\/2)+ ((0b011100)\/2)\nprint (a)\n\n>>> <\/pre>\n\n\n\n
Ecrire 45 en binaire<\/p>\n\n\n\n
128<\/td>64<\/td>32<\/td>16<\/td>8<\/td>4<\/td>2<\/td>1<\/td><\/tr>
0<\/td>0<\/td>1<\/td>0<\/td>1<\/td>1<\/td>0<\/td>1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Inverser les bits:<\/p>\n\n\n\n
10110100<\/p>\n\n\n\n
Ajouter 1:<\/p>\n\n\n\n
101101001<\/p>\n\n\n\n
  101101000 
+101101001 <\/td><\/tr>
= 111111001<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Comment est repr\u00e9sent\u00e9 -128 cod\u00e9 sur 8 bits:<\/p>\n\n\n\n
128 = 10000000<\/p>\n\n\n\n
128<\/td>64<\/td>32<\/td>16<\/td>8<\/td>4<\/td>2<\/td>1<\/td><\/tr>
1<\/td>0<\/td>0<\/td>0<\/td>0<\/td>0<\/td>0<\/td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Compl\u00e9ment \u00e0 1: On inverse les bits pour que la conversion de 128 devienne -128: 1000000 \u2192 00000001<\/p>\n\n\n\n
Compl\u00e9ment \u00e0 2 : 00000001 + 1 \u2192 100000001<\/p>\n\n\n\n
<\/p>\n\n\n\n
\u00e9crire -3,3125 en binaire<\/p>\n\n\n\n
3= 00000011             0,3125= <\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Effectuer cette addition de deux nombres binaires cod\u00e9s sur 8 bits sans faire de conversion.V\u00e9rifier le r\u00e9sultat obtenu en effectuant les conversions.    (00110011)2+ (00011100)2 Recommencer avec cette nouvelle addition. (10110011)2+ (01011100 )2 Ecrire 45 en binaire 128 64 32 16 8 4 2 1 0 0 1 0 1 1 0 1 Inverser les… Poursuivre la lecture Exercices sur les valeurs de base<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/posts\/110"}],"collection":[{"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/comments?post=110"}],"version-history":[{"count":6,"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/posts\/110\/revisions"}],"predecessor-version":[{"id":130,"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/posts\/110\/revisions\/130"}],"wp:attachment":[{"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/media?parent=110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/categories?post=110"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yb-isn.fr\/2021\/nsi\/olga\/wp-json\/wp\/v2\/tags?post=110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}