Bsr c pour demain a rendre aider moi svp

Bonjour,

--> D = 4/3 - 6/5 + 3/7

On va de la gauche vers la droite.

4/3 - 6/5 = 20/15 - 18/15 = 2/15

→ 2/15 + 3/7 = 14/105 + 45/105 = 59/105

--> E = 5/8 * (2/7 + 3/4)

On effectue d'abord l'opération entre parenthèses.

2/7 + 3/4 = 8/28 + 21/28 = 29/28

→ 5/8 * 29/28 = 145/224

--> F = (4/3 + 2)/(5/4 - 9/5)

→ 4/3 + 2 = 4/3 + 6/3 = 10/3

→ 5/4 - 9/5 = 25/20 - 36/20 = (-11)/20

→ 10/3 ÷ (-11)/20 = 10/3 * 20/(-11) = 200/(-33)