Réponse :
bonjour,
A = 23x53 = 1219
B = 5x5x5x5 = 5^4
C = 5x3x3x3x3 = 3^4 x 5
D = 2x2x2x3x3x3x3 = 2^3 x 3^4
A/B x C/D = 1219/625 x 405/648 = 1219/625 x 405:81/625:81 = 1219/625 x 5/8
= 1219x5/625x8 = 6095/5000 = 6095:5/5000:5 = 1219/1000
Explications étape par étape :