Quiz : Maîtrisez les fractions en 7ème année !

Question 1 sur 10 10:00

[{"id":73602,"question":"Quelle est la fraction irréductible équivalente à 18\/24 ?","option_a":"3\/4","option_b":"9\/12","option_c":"6\/8","option_d":"2\/3","option_e":"","option_f":"","bonne_reponse":"A","explication":"Diviser le numérateur et le dénominateur par leur PGCD (6) donne 3\/4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73603,"question":"Pour additionner 1\/4 et 1\/6, quel dénominateur commun doit-on utiliser ?","option_a":"8","option_b":"10","option_c":"12","option_d":"24","option_e":"","option_f":"","bonne_reponse":"C","explication":"Le plus petit multiple commun de 4 et 6 est 12.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73604,"question":"Multiplier une fraction par 5 revient à multiplier son numérateur par 5.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est exact : 5 × (a\/b) = (5a)\/b.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73605,"question":"Quel est le résultat de 2\/3 ÷ 4\/5 ?","option_a":"8\/15","option_b":"10\/12","option_c":"5\/6","option_d":"6\/10","option_e":"","option_f":"","bonne_reponse":"A","explication":"Diviser par une fraction revient à multiplier par son inverse : (2\/3) × (5\/4) = 10\/12 = 5\/6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73606,"question":"La fraction 7\/0 est-elle définie ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un dénominateur ne peut pas être zéro, la fraction n'est pas définie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73607,"question":"Quelle fraction représente 0,75 ?","option_a":"1\/2","option_b":"3\/4","option_c":"2\/3","option_d":"5\/6","option_e":"","option_f":"","bonne_reponse":"B","explication":"0,75 = 75\/100 = 3\/4 après simplification.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73608,"question":"Pour comparer 3\/5 et 4\/7, quelle méthode est la plus efficace ?","option_a":"Les additionner","option_b":"Les multiplier","option_c":"Trouver un dénominateur commun","option_d":"Les soustraire","option_e":"","option_f":"","bonne_reponse":"C","explication":"Trouver un dénominateur commun (35) permet de comparer 21\/35 et 20\/35.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73609,"question":"La fraction 5\/10 est-elle égale à 1\/2 ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Simplifier 5\/10 par 5 donne 1\/2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73610,"question":"Quel est le résultat de 3\/4 + 1\/8 ?","option_a":"4\/12","option_b":"7\/8","option_c":"1\/2","option_d":"5\/8","option_e":"","option_f":"","bonne_reponse":"B","explication":"Dénominateur commun 8 : 6\/8 + 1\/8 = 7\/8.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":73611,"question":"Peut-on diviser une fraction par zéro ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La division par zéro est indéfinie dans tous les cas.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]