ROUZOUNAANLI
Answered

pouvez-vous m'aider encore svp : calculer et simplifier la fraction obtenue si possible A = 7/15 + 3/15 B = -7/12 - 1/12 C = -6/9 + 7/3 D = 4+5/6 E = 13/15 - ( 4/15 + 2/15

Sagot :

MAUDMARINE

Bonjour

A = 7/15 + 3/15 = 10/15 = (5 x 2) / (5 x 3) = 2/3

B = -7/12 - 1/12 = - 8/12 = (4 x - 2) / (4 x 3) = - 2/3

C = -6/9 + 7/3 = - 6/9 + (7 x 3) / (3 x 3) = - 6/9 + 21/9 = 15/9 = (3 x 5) / (3 x 3) = 5/3

D = 4+5/6 = (4 x 6) / (1 x 6) + 5/6 = 24/6 + 5/6 = 29/6

E = 13/15 - ( 4/15 + 2/15) = 13/15 - 6/15 = 7/15.