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Sagot :

Bonjour,

exercice 102

76/24 = 38/12 = 19/6

225/135 = 45/27 = 15/ 9 = 5/3

Exercice 106

D = 11/70 - 3/42

=  (11*42) / (70*42)  - (6*70) / (42*70)

= 462/ 2 940  - 420/ 2 940= 42/2 940

=14/ 980

= 1/70

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