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Sagot :

Réponse :

Explications étape par étape

Bjr,

B

1-1/3 -1/4 = 12/12 - 4/12 - 3/12 = 5/12

Il reste 5/12

2/5 de 5/12 = (2*5) /(5*12) = 10/60 =1/6

(1-1/3-1/4)*2/5 =

(12/12 - 4/12 - 3/12)*2/5

5/12 * 2/5 = 10/60  = 1/6

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