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Sagot :

Bonjour,

Exercice 3

2/3 de 45

(2*45)/3 => 30 km de montée

Exercice 4

A= 10/35 + 42/35 = 52/35

B= 49/70 - 90/70 = -41/70

C=  40/60 + 45/60 + 48/60

= 133/60

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