6:8×(2:3− 2:5)×5:2 merci davance

Bonjour,

6/8 x (2/3 - 2/5) x 5/2

= 6/8 x [(2 x 5) / (3 x 5) - (2 x 3) / (5 x 3)] x 5/2

= 6/8 x (10/15 - 6/15) x 5/2

= 6/8 x 4/15 x 5/2

= 24/120 x 5/2

= 120/240

= (120 x 1) / (120 x 2)

= 1/2.