Maths 7ème : Équations et nombres relatifs — Quiz interactif

Question 1 sur 10 10:00

[{"id":32218,"question":"Quelle est la solution de l'équation 4x - 5 = 19 ?","option_a":"x = 3","option_b":"x = 6","option_c":"x = 4","option_d":"x = 5","option_e":"","option_f":"","bonne_reponse":"C","explication":"Pour résoudre 4x - 5 = 19, ajoutez 5 des deux côtés : 4x = 24. Puis divisez par 4 : x = 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32219,"question":"Le produit de (-3) × (-7) est égal à :","option_a":"-21","option_b":"21","option_c":"10","option_d":"-10","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le produit de deux nombres négatifs est positif. (-3) × (-7) = 21.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32220,"question":"Vrai ou Faux ? L'équation 2x + 1 = 0 a pour solution x = -0,5.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"En soustrayant 1 des deux côtés : 2x = -1. Puis en divisant par 2 : x = -0,5. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32221,"question":"Quelle est la valeur de (-5) + 8 - (-3) ?","option_a":"6","option_b":"16","option_c":"-6","option_d":"0","option_e":"","option_f":"","bonne_reponse":"A","explication":"Calculons étape par étape : (-5) + 8 = 3, puis 3 - (-3) = 3 + 3 = 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32222,"question":"Vrai ou Faux ? La distributivité s'applique uniquement aux nombres positifs.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La distributivité s'applique à tous les nombres, qu'ils soient positifs ou négatifs. Exemple : -2 × (3 + 4) = -2 × 3 + (-2) × 4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32223,"question":"Si x + 4 = -2, alors x est égal à :","option_a":"x = 2","option_b":"x = -6","option_c":"x = 6","option_d":"x = -2","option_e":"","option_f":"","bonne_reponse":"B","explication":"Soustraire 4 des deux côtés : x = -2 - 4 = -6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32224,"question":"Le résultat de (-4) × 5 × (-2) est :","option_a":"-40","option_b":"40","option_c":"20","option_d":"-20","option_e":"","option_f":"","bonne_reponse":"B","explication":"Multipliez d'abord (-4) × 5 = -20, puis -20 × (-2) = 40 (produit de deux nombres négatifs).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32225,"question":"Vrai ou Faux ? L'équation 3(x - 2) = 0 a pour solution x = 2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Développez : 3x - 6 = 0 → 3x = 6 → x = 2. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32226,"question":"Quelle est la solution de l'équation -2x + 7 = 13 ?","option_a":"x = -3","option_b":"x = 3","option_c":"x = -6","option_d":"x = 6","option_e":"","option_f":"","bonne_reponse":"A","explication":"Soustraire 7 des deux côtés : -2x = 6. Puis diviser par -2 : x = -3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32227,"question":"Le résultat de 5 - (-3) + (-8) est :","option_a":"0","option_b":"10","option_c":"-10","option_d":"2","option_e":"","option_f":"","bonne_reponse":"A","explication":"Calculons : 5 - (-3) = 8, puis 8 + (-8) = 0.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]