Bonsoir aider moi svp:calculer et simplifier Résultats

Bonsoir,

4/15 x 3/4 - 13/5

= 12/60 - 13/5

= (12 x 1) / (12 x 5) - 13/5

= 1/5 - 13/5

= - 12/5

12 x (5/8 - 1/4)

= 12 x [5/8 - (1 x 2) / (4 x 2)]

= 12 x (5/8 - 2/8)

= 12 x 3/8

= 36/8

= (4 x 9) / (4 x 2)

= 9/2

3 + - 2/3 x 3/-4 x 4/5 x 5/- 6

= 3 - 2/3 x - 3/4 x 4/5 x - 5/6

= 3 + 6/12 x - 20/30

= 3 - 120/360

= (3 x 3) / (1 x 3) - (120 x 1) / (120 x 3)

= 9/3 - 1/3

= 8/3

- 4/9 x 27/12 + 16/8 x - 5/4

= - 108/108 - 80/32

= - 1 - (16 x 5) / (16 x 2)

= (- 1 x 2) / (1 x 2) - 5/2

= - 2/2 - 5/2

= - 7/2

2/9 - 1/9 x 4/5

= 2/9 - 4/45

= (2 x 5) / (9 x 5) - 4/45

= 10/45 - 4/45

= 6/45

= (3 x 2) / (3 x 15)

= 2/15

(3/5 - 3/25) x 5/4 + 1

= [(3 x 5) / (5 x 5) - 3/25] x 5/4 + 1

= (15/25 - 3/25) x 5/4 + 1

= 12/25 x 5/4 + 1

= 60/100 + 1

= (20 x 3) / (20 x 5) + (1 x 5) / (1 x 5)

= 3/5 + 1/5

= 4/5.