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Sagot :

Bonjour

Calculer en détaillant les étapes :

A= 7/24 - 3/4

A= 7/24 - (3  x 6) / (4x 6)

A = 7/24 -18/24

A=-11/24

B= - 8/7 - 2/5

B = (- 8 x 5) / (7 x 5) - (2x 7) / (5 x 7)

B = - 40/35 - 14/35

B = - 54/35

C= 9/14 - 5

C = 9/14 - (5x 14)/ (1x 14)

C = 9/14 - 70/14

C = - 61/14.

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