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Sagot :

Réponse:

A. -0,5 x 50 x - 4 x4 = - 25 x - 4 x 4 = 100 x 4 = 400

B. - 3,2 X - 0,3 x 3 x - 1 = 0,96 x 3 x - 1 = 2,88 x 1 = 2,88

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