Réponse:
Bonjour,
Exercice 37.
c) 1/2 x 1/3 x 1/4 x 1/5 = 1x1x1x1 / 2x3x4x5 = 1/120
d) 3/8 x 7/10 x 1/5 = 3x7x1 / 8x10x5 = 21/400
Exercice 38.
a) 3/7 x 8/3 = 3x8 / 7x3 = 24/21 = 8/7
b) 2/15 x 15/11 = 2x15 / 15x11 = 30/165 = 6/33 = 2/11
c) 14/23 x 1/7 = 14x1 / 23x7 = 14/161 = 2/23
d) 2/11 x 3/4 = 2x3 / 11x4 = 6/44 = 3/22
e) 7/8 x 1/21 = 7x1 / 8x21 = 7/168 = 1/24
f) 2/3 x 3/4 x 4/5 = 2x3x4 / 3x4x5 = 24/60 = 12/30 = 6/15
