Quiz de mathématiques : 7ème année — Arithmétique et géométrie

Question 1 sur 10 10:00

[{"id":59687,"question":"Quel est le résultat de 45,6 + 12,3 ?","option_a":"57,9","option_b":"56,9","option_c":"57,8","option_d":"58,9","option_e":"","option_f":"","bonne_reponse":"A","explication":"Addition de nombres décimaux : aligner les virgules et additionner les chiffres de même rang. 45,6 + 12,3 = 57,9.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59688,"question":"Un rectangle a une longueur de 8 cm et une largeur de 5 cm. Son périmètre est de :","option_a":"26 cm","option_b":"40 cm","option_c":"13 cm","option_d":"30 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un rectangle se calcule par la formule P = 2 × (longueur + largeur). Ici, P = 2 × (8 + 5) = 26 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59689,"question":"Vrai ou Faux : 3 × (4 + 5) = 3 × 4 + 3 × 5.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est la propriété de distributivité de la multiplication sur l'addition. Les deux expressions sont égales : 3 × 9 = 27 et 12 + 15 = 27.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59690,"question":"Quel est le résultat de 120 ÷ 8 ?","option_a":"15","option_b":"12","option_c":"10","option_d":"20","option_e":"","option_f":"","bonne_reponse":"A","explication":"Division de 120 par 8 : 8 × 15 = 120, donc 120 ÷ 8 = 15.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59691,"question":"Vrai ou Faux : Un triangle équilatéral a trois angles égaux à 60°.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Dans un triangle équilatéral, les trois angles sont égaux et leur somme est 180°. Chaque angle mesure donc 60°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59692,"question":"Quel est le résultat de 0,75 × 100 ?","option_a":"75","option_b":"7,5","option_c":"0,075","option_d":"750","option_e":"","option_f":"","bonne_reponse":"A","explication":"Multiplier un nombre décimal par 100 revient à déplacer la virgule de deux rangs vers la droite : 0,75 × 100 = 75.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59693,"question":"Un carré a un côté de 6 cm. Son aire est de :","option_a":"36 cm²","option_b":"24 cm²","option_c":"12 cm²","option_d":"18 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un carré se calcule par la formule A = côté × côté. Ici, A = 6 × 6 = 36 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59694,"question":"Vrai ou Faux : 10 - (3 + 2) = 10 - 3 + 2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La soustraction ne suit pas la distributivité comme la multiplication. 10 - (3 + 2) = 5, tandis que 10 - 3 + 2 = 9.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59695,"question":"Quel est le résultat de 15 % de 200 ?","option_a":"30","option_b":"25","option_c":"20","option_d":"15","option_e":"","option_f":"","bonne_reponse":"A","explication":"Calculer un pourcentage : 15 % de 200 = (15\/100) × 200 = 30.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":59696,"question":"Vrai ou Faux : Le périmètre d'un cercle se calcule avec la formule P = π × rayon.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La formule correcte est P = 2 × π × rayon ou P = π × diamètre. La formule donnée est incorrecte.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]