Bonsoir
Recopier et écrire sous forme simplifiée :
(14 x 12)/(18 x 35)
= (2 x 7 x 3 x 4)/(2 x 3 x 3 x 5 x 7)
= 4/(3 x 5)
= 4/15
(24 x 27)/(63 x 30)
= (3 x 2 x 4 x 3 x 9)/(7 x 9 x 3 x 2 x 5)
= (4 x 3)/(5 x 7)
= 12/35
(18 x 35 x 4)/(14 x 13 x 30)
= (2 x 3 x 3 x 5 x 7 x 2 x 2)/(2 x 7 x 13 x 3 x 2 x 5)
= (2 x 2 x 3 x 5 x 7 x 2 x 3)/(2 x 2 x 3 x 5 x 7 x 13)
= (2 x 3)/13
= 6/13
