Les bases des mathématiques — Exercice 1 (Niveau A1)

Question 1 sur 10 10:00

[{"id":14878,"question":"Quelle est la valeur de l'expression 5 × (3 + 2) ?","option_a":"20","option_b":"25","option_c":"15","option_d":"10","option_e":"","option_f":"","bonne_reponse":"B","explication":"On applique d'abord la règle des parenthèses : 3 + 2 = 5. Ensuite, on multiplie par 5 : 5 × 5 = 25.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14879,"question":"La soustraction est-elle une opération commutative ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La soustraction n'est pas commutative : 5 - 3 ≠ 3 - 5. Le résultat dépend de l'ordre des termes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14880,"question":"Quel est le résultat de 12 ÷ 3 + 4 ?","option_a":"8","option_b":"4","option_c":"7","option_d":"6","option_e":"","option_f":"","bonne_reponse":"A","explication":"On effectue d'abord la division : 12 ÷ 3 = 4. Ensuite, on ajoute 4 : 4 + 4 = 8.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14881,"question":"L'addition est-elle une opération associative ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'addition est associative : (a + b) + c = a + (b + c). Le résultat ne dépend pas du groupement des termes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14882,"question":"Quelle est la valeur de 7 × 0 ?","option_a":"7","option_b":"0","option_c":"1","option_d":"70","option_e":"","option_f":"","bonne_reponse":"B","explication":"Tout nombre multiplié par 0 donne 0. C'est une propriété fondamentale de la multiplication.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14883,"question":"Le nombre 15 est-il un multiple de 3 ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"15 ÷ 3 = 5, donc 15 est bien un multiple de 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14884,"question":"Quel est le résultat de 10 - (2 × 3) ?","option_a":"4","option_b":"6","option_c":"16","option_d":"24","option_e":"","option_f":"","bonne_reponse":"A","explication":"On commence par la multiplication : 2 × 3 = 6. Ensuite, on soustrait : 10 - 6 = 4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14885,"question":"La division est-elle toujours exacte ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La division n'est pas toujours exacte. Par exemple, 7 ÷ 2 = 3,5, qui n'est pas un entier.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14886,"question":"Quelle est la valeur de 4² ?","option_a":"8","option_b":"16","option_c":"4","option_d":"6","option_e":"","option_f":"","bonne_reponse":"B","explication":"4² signifie 4 multiplié par lui-même : 4 × 4 = 16.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14887,"question":"Le nombre 0 est-il un nombre naturel ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Dans la plupart des définitions modernes, 0 est considéré comme un nombre naturel.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]