1. Calcul mental Les prix Squence n7 2. n1Calculer 50% de 144 3. n2Calculer 25% de 28 4. n3Calculer 30% de 200 5. n4Calculer 10% de 32,50 6. n5Calculer 20% de 800 7. Correction 8. n1Calculer 50% de 144 9. n1Calculer 50% de 144 144 2 = 10. n1Calculer 50% de 144 144 2 = 72 11. n2 Calculer 25% de 28 12. n2 Calculer 25% de 28 28 4 = 13. n2 Calculer 25% de 28 28 4 = 7 14. n3 Calculer 30% de 200 15. n3 Calculer 30% de 200 30200 = 100 16. n3 Calculer 30% de 200 30200 = 200 10030100 17. n3 Calculer 30% de 200 30200 = 200 10030100 = 2 30 = 18. n3 Calculer 30% de 200 30200 = 200 10030100 = 2 30 = 60 19. n3 Calculer 30% de 200 30200 = 200 10030100 = 2 30 = 60 30200 = 100 20. n3 Calculer 30% de 200 30200 = 200 10030100 = 2 30 = 60 30200 = 0,30200 100 21. n3 Calculer 30% de 200 30200 = 200 10030100 = 2 30 = 60 30200 = 0,30200 100 = 60 22. 30200 = 100 23. 30200 = 200 30100100 24. 30200 = 200 30100100 = 6000 100 25. 30200 = 200 30100100 = 6000 100= 60 26. n4Calculer 10% de 32,50 27. n4Calculer 10% de 32,50 32,50 10 = 28. n4Calculer 10% de 32,50 32,50 10 = 3,25 29. n5 Calculer 20% de 800 30. n5 Calculer 20% de 800 20800 = 100 31. n5 Calculer 20% de 800 20800 = 800 10020100 32. n5 Calculer 20% de 800 20800 = 800 10020100 = 8 20 = 33. n5 Calculer 20% de 800 20800 = 800 10020100 = 8 20 = 160 34. n5 Calculer 20% de 800 20800 = 800 10020100 = 8 20 = 160 20800 = 100 35. n5 Calculer 20% de 800 20800 = 800 10020100 = 8 20 = 160 20800 = 0,20800 100 36. n5 Calculer 20% de 800 20800 = 800 10020100 = 8 20 = 160 20800 = 0,20800 100 = 160 37. 20800 = 100 38. 20800 = 800 20100100 39. 20800 = 800 20100100 = 16000 100 40. 20800 = 800 20100100 = 16000 100= 160