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55 médiaires. Calculer en écrivant les étapes inter- A = 10-6x2 B = 13-5+2-1 C = (2,5 + 16 +3,5) x 10 D = (105) × (6 + 4) × 2 E = 10 + (5 x 3-4) x 2 F = [(10-5) x 6-4] × 2 ​

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