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→ Niveau 1 / Avec des relatifs 3 x 6L+2 x 4L-7L+5 x 2L = 5€ - 2 x 6$ + 4 x (2€ + 1$) = 4m + 6m x 3-5 x 2m + 1m = 1-5×10÷2+(-7)-5= (1-5) x 10 ÷ (2 + (-7) - 5) = 3 +2× (-4) - 1 (3-5) × (-4) ÷ 2​

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