Corrigé EXERCICE 1 (7,5 POINTS)
2×12,3×50 = (2×50)×12,3 = 100×12,3 = 1230. 2. 25×3,7×4 = (25×4)×3,7 = 100×3,7 = 370. 3. 12×2,5×5×4 = (12×5)×(2,5×4) = 60×10 = 600. 4. 500×25×0,4×2 = (500×2) ...
2×12,3×50 = (2×50)×12,3 = 100×12,3 = 1230. 2. 25×3,7×4 = (25×4)×3,7 = 100×3,7 = 370. 3. 12×2,5×5×4 = (12×5)×(2,5×4) = 60×10 = 600. 4. 500×25×0,4×2 = (500×2) ...