Bonjour
Calculer et simplifier :
a) 15/7 × 1/3 × 4/9
= 15/21 x 4/9
= 60/168
= (12 x 5) / (12 x 14)
= 5/14
b) 11/30 × 12 × 5/44
= 132/30 x 5/44
= 660/1 320
= (660 x 1) / (660 x 2)
= 1/2
c) 9/8 × 16/27 × 72/23
= 144/216 x 72/23
= 10 368/4 968
= (216 x 48) / (216 x 23)
= 48/23.
