pouvez vous m'aider svp -15/-26 : 10/-39 =? -5+(3/7 : 4/5 ) x 1/3 =? 5x 1/4 - 1/3=?

Réponse :

Explications étape par étape

Bonjour

-15/-26 : 10/-39 =

= 15/26 x -39/10

= 15/10 x -39/26

= (5 x 3)/(5 x 2) x (-3 x 13)/(2 x 13)

= 3/2 x -3/2

= -9/4

-5+(3/7 : 4/5 ) x 1/3 =

= -5 + 3/7 x 5/4 x 1/3

= -5 + 3/3 x 5/4 x 1/7

= -5 + 5/28

= -140/28 + 5/28

= -135/28

5x 1/4 - 1/3=

= 5/4 - 1/3

= 15/12 - 4/12

= 11/12

Bonjour,

- 15/- 26 : 10/- 39

= 15/26 x - 39/10

= - 585/260

= (65 x - 9) / (65 x 4)

= - 9/4

- 5 + (3/7 : 4/5) x 1/3

= - 5 + (3/7 x 5/4) x 1/3

= - 5 + 15/28 x 1/3

= - 5 + 15/84

= (- 5 x 84) / (1 x 84) + 15/84

= - 420/84 + 15/84

= - 405/84

= (3 x - 135) / (3 x 28)

= - 135/28

5 x 1/4 - 1/3

= 5/4 - (1 x 4) / (3 x 4)

=  5/4 - 4/12

= (5 x 3) / (4 x 3) - 4/12

= 15/12 - 4/12

= 11/12