Bonjouir,
Exercice 4
8+12+16 = 36
8/36 = 4/18 = 2/9
12/36 = 6/18 = 3/6 = 1/3
16/36 = 8/18 = 4/9
2/9 de 7 350 => (2*7 350)/9 =>1 633,33 -> 1 633€
1/3 de 7 350 => 7 350/3 =>2 450€
74/9 de 7 350 => (4* 7 350) / 9 =>3266, 66 -> 3 267€
Exercice 5
5kg -> 2,3kg
1kg -> 2,3/ 5
240kg -> (2,3 * 240)/ 5 =>110,4kg de zinc
2,3 -> 5
1 -> 5/2,3
460 -> (5*460)/ 2,3 => 1 000kg de laiton
