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Bonjour pouvez-vous m'aidez ?
Calculer:
A=3/5+2/15 A= A=

B= 4/36+5/6 B= B=

C= 2/5-2/3-4/5 C= C=

D=11/7-8/14+5/21 D= D=

E=2/9-2/18+5/6 E= E=

F=-3/4+2/8-4/16 F= F=


Répondre :

Bonjour,

A = 3/5 + 2/15

A = 9/15 + 2/15

A = 11/15

B = 4/36 + 5/6

B = 4/36 + 30/36

B = 34/36 = 17/18

C = 2/5 - 2/3 - 4/5

C = 6/15 - 10/15 - 12/15

C = -4/15 - 12/15

C = -16/15

D = 11/7 - 8/14 + 5/21

D = 33/21 - 4/7 + 5/21

D = 33/21 - 12/21 + 5/21

D = 21/21 + 5/21

D = 26/21

E = 2/9 - 2/18 + 5/6

E = 4/18 - 2/18 + 15/18

E = 2/18 + 15/18

E = 17/18

Tu essaies le dernier ? :)