Mathématiques 1ère année secondaire : Les bases à maîtriser

Question 1 sur 10 10:00

[{"id":28638,"question":"Quel est le résultat de l'opération suivante : 15 + 7 × 3 ?","option_a":"36","option_b":"42","option_c":"66","option_d":"22","option_e":"","option_f":"","bonne_reponse":"B","explication":"Il faut respecter la priorité des opérations : la multiplication est prioritaire sur l'addition. 7 × 3 = 21, puis 15 + 21 = 36.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28639,"question":"L'équation 2x + 5 = 11 a pour solution x = 3.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"En remplaçant x par 3 : 2×3 + 5 = 6 + 5 = 11. L'équation est donc correcte, mais la solution est x = 3, donc l'affirmation est vraie. Correction : l'affirmation est \u003Cstrong\u003EVraie\u003C\/strong\u003E.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28640,"question":"Quelle est la valeur de x dans l'inéquation 4x - 7 \u003C 13 ?","option_a":"x \u003C 5","option_b":"x \u003E 5","option_c":"x ≤ 5","option_d":"x = 5","option_e":"","option_f":"","bonne_reponse":"A","explication":"Résolvons l'inéquation : 4x - 7 \u003C 13 → 4x \u003C 20 → x \u003C 5. La solution est donc x \u003C 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28641,"question":"Le nombre 0,75 est un nombre décimal.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un nombre décimal est un nombre qui peut s'écrire sous la forme d'une fraction dont le dénominateur est une puissance de 10. 0,75 = 75\/100, donc c'est un nombre décimal.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28642,"question":"Quel est le résultat de (8 + 4) × 2 ?","option_a":"16","option_b":"24","option_c":"12","option_d":"32","option_e":"","option_f":"","bonne_reponse":"B","explication":"On commence par calculer la parenthèse : 8 + 4 = 12, puis on multiplie par 2 : 12 × 2 = 24.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28643,"question":"La division 12 ÷ 0 est possible.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La division par zéro est \u003Cstrong\u003Eimpossible\u003C\/strong\u003E en mathématiques. Elle n'est pas définie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28644,"question":"Quelle est la solution de l'équation 3x = 15 ?","option_a":"x = 5","option_b":"x = 3","option_c":"x = 12","option_d":"x = 45","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x = 15, on divise les deux côtés par 3 : x = 15 ÷ 3 = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28645,"question":"Le nombre 123,456 a 3 chiffres après la virgule.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le nombre 123,456 a bien 3 chiffres après la virgule : 4, 5 et 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28646,"question":"Quel est le résultat de 10 - 3 × 2 ?","option_a":"4","option_b":"14","option_c":"7","option_d":"1","option_e":"","option_f":"","bonne_reponse":"A","explication":"On respecte la priorité des opérations : 3 × 2 = 6, puis 10 - 6 = 4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":28647,"question":"La somme de deux nombres impairs est toujours paire.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Exemple : 3 (impair) + 5 (impair) = 8 (pair). La somme de deux nombres impairs est toujours paire.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]