Bonjour;
a)
(2*18)/3
= 36/3
= 12
b)
(5*24)/4
=120/4
=30
c)
(3*420)/7
= 1 20/7
=180
d)
(17*55)/11
= 935/11
=85
Réponse:
a) 2/3 de 18 = 2×18/3×1 = 36/3 = 12×3/1×3 = 12/1 = 12
b) 5/4 de 24 = 5×24/4×1= 120/4 = 30×4/1×4 = 30/1 = 30
c) 3/7 de 420 = 3×420/7×1 = 1260/7 = 180×7/1×7 = 180/1 = 180
d) 17/11 de 55 = 17×55/11×1 = 935/11 = 85×11/1×11 = 85/1 = 85
